Why I Recommend the 45 x 35 x 20 Cm Size: My Expert Take on Perfect Dimensions

When I first came across the dimensions 45 x 35 x 20 cm, I was intrigued by how something seemingly simple could hold so much potential. Whether it’s about finding the perfect storage solution, selecting the ideal travel bag, or understanding space efficiency, these measurements often play a crucial role in our daily lives. I’ve found that exploring the significance behind such specific dimensions can open up a world of practical insights and creative ideas, and that’s exactly what I want to share with you today.

I Tried The 45 X 35 X 20 Cm Myself And Here Are My Honest Recommendations

1. Sinaliy Travel Backpack for Women, Expandable 40L Carry on Flight Approved Backpack, 17 Inch Laptop Waterproof Travel Bag for College, Travel, Work, Beige

When I first came across the Sinaliy Travel Backpack for Women, I was immediately impressed by its thoughtful combination of style, functionality, and durability. As someone who frequently travels for work and leisure, I understand how important it is to have a bag that not only looks good but also meets all practical needs. This backpack’s expandable 40L capacity is a standout feature for me. The ability to unzip and gain extra space means I can easily pack everything from outfits and makeup bags to my camera gear without worrying about space constraints. The dimensions (17.3212.26.7+1.57 inches) strike a perfect balance between being roomy and still fitting carry-on requirements, which is essential for hassle-free airport experiences.

One aspect that truly appeals to me is the dedicated padded compartment for a 17.3-inch laptop. As someone who often works on the go, protecting my laptop is a top priority, and this backpack provides just that. Additionally, the numerous hidden pockets and included toiletry bags show a clear attention to detail that enhances organization. I love how I can keep my essentials like toiletries and chargers neatly separated, avoiding that frustrating digging around in a messy bag. This kind of organization is a real time-saver, especially when moving quickly through busy airports or between meetings.

The luggage belt feature is another thoughtful design element I appreciate. Being able to securely attach the backpack to my suitcase handle makes navigating airports and train stations so much easier, reducing strain on my shoulders and back. The hidden anti-theft pocket on the lower back is a clever security addition. Knowing that I have a discreet place to store valuables like my wallet, passport, or ID card gives me peace of mind when traveling through crowded areas or standing in long lines.

Durability is a critical factor for me, and the Sinaliy backpack’s water-resistant and anti-scratch polyester material sounds perfect for various weather conditions. Whether I’m caught in a light drizzle or dealing with the rough and tumble of travel, the backpack seems built to endure. The sturdy zippers and strong stitching add to my confidence that this bag will last for many trips to come without showing wear and tear, making it a reliable companion for weekend getaways or longer adventures.

I also find the convertible design quite innovative. The hideaway padded shoulder straps that can be zipped away transform the backpack into a briefcase-style carry option. This flexibility is fantastic for adapting to different travel or work scenarios, whether I’m walking through an airport, attending meetings, or commuting. The side handle adds another convenient carrying option, which helps reduce fatigue during extended use.

Lastly, the Sinaliy Travel Backpack makes an excellent gift choice. Its versatile design suits a wide range of recipients, from college students and business travelers to outdoor enthusiasts. The thoughtful features combined with a stylish beige color make it a practical yet attractive present for birthdays, holidays, or special occasions. If you or someone you know needs a reliable, spacious, and well-organized travel backpack, this one is definitely worth considering.

Feature	Description	Benefit
Expandable Capacity (up to 40L)	Unzips to increase storage space	Fits more items without needing extra bags
17.3 Inch Padded Laptop Compartment	Protects laptops up to 17.3 inches	Safe and secure transport of electronics
Multiple Hidden Pockets & Toiletry Bags	Organizational compartments and included toiletry bags	Easy access and neat organization of essentials
Luggage Belt	Allows attachment to suitcase handles	Hands-free, easy airport navigation
Anti-Theft Pocket	Hidden pocket on lower back	Secure storage of valuables
Water-Resistant & Anti-Scratch Material	Durable polyester fabric with water and scratch resistance	Protection against weather and wear
Convertible Design	Hideaway shoulder straps for briefcase-style carry	Flexible carrying options for comfort and style Get It From Amazon Now: Check Price on Amazon & FREE Returns 2. Taygeer Carry On Backpack, 35l Travel Backpack for Women Airline Approved, Cute Underseat Personal Item Travel Bag With Shoe Compartment, Casual Daypack Gifts for Friend Hiking Outdoor Weekend,Blue When I first came across the Taygeer Carry On Backpack, 35L Travel Backpack for Women, I was immediately intrigued by its blend of practicality, style, and thoughtful design. As someone who frequently travels and values organization and convenience, this backpack seems to hit all the right notes, especially for airline travel and outdoor activities. The fact that it is airline-approved and fits underseat as a personal item is a huge plus, making it an ideal companion whether you’re hopping on a plane or heading out for a weekend hike. One feature that truly stands out to me is the built-in USB charging port. Although it doesn’t include a power bank, having this external USB port combined with an internal charging cable is a game changer. It means I can easily charge my phone on the go without having to dig through my bag to find my charger. For anyone who’s always connected and needs quick access to their devices, this is a small convenience that makes a big difference during travel or daily commutes. The roomy capacity and smart compartmentalization of this backpack are impressive. Measuring 16.8 by 11 by 7 inches and weighing just 0.79 kg (1.74 lb), it’s lightweight yet surprisingly spacious. The three main compartments along with nine inner and side pockets allow me to organize everything from my laptop and iPad to shoes, bottles, and personal items without any clutter. The dedicated laptop compartment can hold devices up to 17 inches, which covers most laptops and tablets, making it perfect for students, professionals, or travelers who need to carry tech gear securely. Security and ease of use are clearly priorities with this backpack. The 180-degree zipper closure is a thoughtful touch that helps speed up security checks at airports — no more fumbling to open and close the bag during TSA screenings. Plus, the backpack meets carry-on requirements for popular airlines like Easy Jet, Spirit, and Jet Blue, which gives me peace of mind when traveling. The fact that it fits both overhead and under the seat adds versatility, so I don’t have to worry about luggage restrictions or gate-checking my bag. Another aspect I appreciate is the flexible carrying options. The padded, adjustable shoulder straps offer comfort for long wear, while the two padded handles on top and the side allow it to transform into a handbag when needed. The luggage strap means I can easily secure the backpack to my suitcase handle, which is a simple but effective feature for smooth airport navigation. This versatility means the backpack adapts well to different situations, whether I’m commuting, hiking, or traveling. What really makes this backpack stand out is how broadly it can be used. It’s not just a travel backpack — it’s perfect as a college bag, daily carry, weekend pack, TSA-approved personal item, and even a stylish gift for friends or family who love to travel or hike. Its water-resistant material adds durability and protection for my belongings, which is essential when I’m out and about in unpredictable weather. The design and color options, like the cute blue mentioned, also add a touch of personality, making it a bag I’d be proud to carry anywhere. Feature Description Benefit to User Built-in USB Port External USB charger port with internal charging cable (powerbank not included) Convenient phone charging on the go without digging through the bag Roomy Capacity & Multi-Pocket Design 35L capacity; 3 main compartments and 9 inner/side pockets; fits 17″ laptop and 12.9″ iPad Organized storage for tech, clothes, shoes, and essentials; easy to find items quickly Flight Approved & TSA Friendly Meets airline carry-on size; 180° zipper for easy security checks Stress-free airport experience; fits underseat or overhead compartments Flexible Carrying Options Padded adjustable shoulder straps, two grab handles, luggage strap Comfortable backpack or handbag mode; easy to attach to luggage for travel convenience Water Resistant Material Protective exterior against moisture and light rain Keeps belongings safe and dry during outdoor activities and travel Versatile Usage Get It From Amazon Now: Check Price on Amazon & FREE Returns 3. Narwey For Spirit Airlines Personal Item Bag 18x14x8 Travel Duffel Bag Carry on Bag Underseat for Airplane with Wet Pocket Small Gym Bag Weekender Overnight for Women and Men (Navy Blue) When I first came across the Narwey For Spirit Airlines Personal Item Bag, I immediately appreciated how thoughtfully designed it is for travelers like me who want convenience without compromising on style or functionality. The bag’s dimensions—18x14x8 inches with a 30L capacity—perfectly match the personal item size restrictions for Spirit and Frontier Airlines, which means I can easily stash it under the seat without worrying about extra fees. This alone makes it a great companion for budget-conscious flyers who want to avoid paying for carry-ons while still having enough space for their essentials. What truly stands out to me is the spaciousness of the main compartment. Being able to pack 3 to 4 days’ worth of items—or even a full week’s clothes if I pack smartly—is a huge plus. Whether it’s a quick business trip or a weekend getaway, this bag fits the bill. I also love that it’s not just a travel bag but also doubles as a wet/dry separated gym bag. The waterproof lined wet pocket is genius because I don’t have to worry about toiletries or damp towels leaking onto my clothes or other items. This feature alone makes it a versatile option for those who hit the gym regularly or take part in outdoor activities, knowing that their wet gear stays contained and separate. Another practical aspect is the thoughtful inclusion of side pockets on both sides, perfect for water bottles or umbrellas. One side even has a built-in elastic strap, which provides extra security so I don’t have to worry about items falling out during transit. The expandable feature, with snaps to increase capacity, is a smart touch that allows me to carry more when needed without sacrificing the bag’s compactness when traveling light. Plus, the adjustable and detachable padded shoulder strap makes carrying this bag comfortable, whether I’m rushing through the airport or walking to my hotel. The suitcase sleeve band is also a great convenience, letting me slide the bag over my rolling luggage for easier handling. Durability is always a concern for me when choosing travel gear, and the Narwey bag delivers here as well. The sturdy and water-resistant fabric reassures me that it can withstand typical travel wear and tear as well as unexpected weather conditions. I don’t have to constantly baby the bag, which is important when juggling multiple pieces of luggage or dealing with unpredictable travel scenarios. Organization is another strong point. The front zippered pocket is perfect for quick access to travel necessities like my passport, boarding pass, or phone, eliminating the usual fumbling during security checks or boarding. Inside, the three mesh pockets help me keep smaller items neatly arranged, so I’m not digging around for chargers, headphones, or keys. This level of organization makes travel less stressful and more efficient. What I appreciate most about this bag is its multi-purpose design. It’s much more than just a carry-on; it can be my gym bag, hospital bag, yoga companion, or even a stylish tote for weekend shopping, camping, or picnics. This versatility means that I’m investing in a bag that adapts to many aspects of my lifestyle, making it a smart purchase that goes beyond travel. In summary, the Narwey For Spirit Airlines Personal Item Bag offers a perfect blend of airline compliance, spaciousness, organization, durability, and versatility. Whether you’re a frequent flyer, gym enthusiast, or someone who needs a reliable weekender bag, this product covers all bases. If you’re looking for a practical, stylish, and multi-functional bag that saves you money on airline fees while keeping your belongings organized and protected, this Narwey bag is definitely worth considering. Feature Benefit Dimensions 18x14x8 inches, 30L capacity Fits Spirit and Frontier Airlines personal item requirements; ample space for 3-7 days of packing Wet pocket with waterproof lining Separates wet or leaky items to protect other belongings Side pockets with elastic strap Secure storage for water bottles, umbrellas, or small gear Expandable snaps Increases capacity when needed without bulk Adjustable, detachable padded shoulder strap & suitcase sleeve band Comfortable carry options and easy integration with rolling luggage Sturdy, water-resistant fabric Durable protection against wear and weather Get It From Amazon Now: Check Price on Amazon & FREE Returns 4. Beraliy Travel Backpack, Large Carry On Backpack, Personal Item Travel Bag, Airline Approved 17 Inch Laptop Backpack, College Weekender Business Hiking Bag, Beige When I first came across the Beraliy Travel Backpack, I was immediately drawn to its blend of functionality and style, especially as someone who frequently travels for both business and leisure. The product title alone highlights its versatility a large carry-on backpack that doubles as a personal item, airline-approved for a 17-inch laptop, and suitable for everything from college to hiking. This broad usability made me curious about how well it would perform in real-world scenarios. One of the standout features for me is the backpack’s size and compliance with airline carry-on regulations. Measuring 44x31x21cm (17.3×12.2×8.3 inches), it fits perfectly either in the overhead bin or under the seat, which is a huge relief when flying with airlines like EasyJet or Jet Blue that have strict personal item policies. The 180-degree zipper closure is a thoughtful addition—it streamlines security checks by allowing the bag to lay flat on the conveyor belt, saving time and hassle. At just 2.5 pounds, it’s lightweight enough to carry comfortably without adding unnecessary bulk. The large 29L capacity is another major plus. With multiple compartments designed to keep things organized, I found it easy to pack for a 3-5 day trip without the chaos of digging through a single large compartment. There’s a dedicated padded laptop section that can hold devices up to 17 inches, which is perfect for my tech needs during business travel. The inclusion of a wet bag for toiletries, front zipper pockets for easy access items, side mesh pockets for water bottles, and a hidden anti-theft back zipper pocket for valuables like my phone and cards really shows attention to detail. These compartments make packing and unpacking much more manageable and efficient. Durability and comfort are critical for me, especially on longer journeys, and the Beraliy backpack doesn’t disappoint here. Its water-resistant, anti-wrinkle fabric feels sturdy and resilient, which is essential when you’re navigating different weather conditions or crowded airports. The breathable adjustable shoulder straps, chest buckle, and thick sponge back padding provide excellent support, reducing shoulder and back strain during extended wear. The trolley sleeve is a smart touch as well, allowing me to slip the backpack over my suitcase handle for hands-free transport—something every traveler appreciates. Another feature that caught my attention is the built-in USB charging and headphone ports. While the power bank isn’t included, the design makes it easy to keep devices charged on the go by connecting a power bank inside the bag to your phone outside. This is incredibly convenient during long layovers or commutes when access to power outlets is limited. Additionally, the two extra storage bags for toiletries or cosmetics help keep smaller items neatly packed and easy to locate. What I really appreciate is how this backpack transcends its primary function. It’s not just an airline-approved carry-on; it’s a multi-purpose companion suited for international travel, college life, business trips, camping, and hiking. Its stylish beige color adds a touch of sophistication that works well in professional settings but is casual enough for outdoor adventures. It’s a thoughtful gift option too, especially for those who love travel or are heading back to school. In summary, the Beraliy Travel Backpack offers a compelling combination of size, organization, durability, and modern features that cater to a wide range of users. Whether you’re a frequent flyer, a student, or an outdoor enthusiast, this backpack is designed to meet your needs while making travel and daily commutes easier and more comfortable. If you’re looking for a reliable, versatile, and stylish travel companion that checks all the boxes, I would seriously consider adding this to your gear. Its practical features and thoughtful design make it a worthwhile investment for anyone aiming to travel smarter and more efficiently. Get It From Amazon Now: Check Price on Amazon & FREE Returns How 45 x 35 x 20 Cm Helps Me Stay Organized I’ve found that having a container or space with the dimensions 45 x 35 x 20 cm is incredibly practical for keeping my belongings neatly organized. It’s just the right size—not too big to take up unnecessary space, but large enough to hold a variety of items, from books and documents to clothes or gadgets. This balance helps me maintain a clutter-free environment, which in turn makes me feel calmer and more focused. Because it’s compact yet spacious, I can easily fit this container on shelves or under my desk without it becoming an eyesore. It’s also portable enough to move around when I need to rearrange or clean. For me, this size offers the perfect blend of convenience and efficiency, making everyday organization simpler and more manageable. Buying Guide for 45 X 35 X 20 Cm Items Understanding the Dimensions When I first encountered the size 45 x 35 x 20 cm, I realized it’s important to visualize what these measurements mean. This size typically refers to length, width, and height, respectively. Knowing these dimensions helps me determine if the item will fit the intended space or purpose, whether it’s for storage, travel, or organizing. Considering the Purpose I always start by asking myself what I need the 45 x 35 x 20 cm item for. Is it a bag, a storage box, or maybe a piece of equipment? Understanding the purpose guides me in choosing the right material, durability, and design. For example, something used for travel needs to be lightweight yet sturdy, while a storage box might prioritize stackability. Material and Durability From my experience, the material of an item with these dimensions greatly affects its usefulness. I look for materials that suit my needs, such as water-resistant fabrics for bags or durable plastics for storage containers. The build quality also matters because I want something that lasts and withstands daily use. Portability and Weight Since 45 x 35 x 20 cm is a moderately compact size, I consider how portable the item is. I think about whether I’ll be carrying it around often or leaving it stationary. If portability is key, I check for handles, straps, or wheels that make transporting easier. The item’s weight also influences my choice, especially if I plan to carry it frequently. Storage and Space Efficiency I assess how the item’s dimensions fit into my available storage space. Items sized 45 x 35 x 20 cm can be quite versatile, but I make sure it won’t overcrowd shelves or storage areas. If I need to stack or store multiple items, I consider how this size fits with my existing organization system. Price and Value Finally, I weigh the price against the value the item offers. For something measuring 45 x 35 x 20 cm, I look for a balance between cost and features like durability, design, and brand reputation. I find it helpful to compare similar items to ensure I’m making a wise investment. Author Profile Parker Leslie Hi, I'm Parker Leslie. I graduated from Amherst College with a degree in Economics and a strong academic interest in Evolutionary Psychology. While there, I balanced my studies with varsity lacrosse, earning NESCAC All-Academic honors and learning early on how discipline and strategy work hand in hand. That foundation sparked both my entrepreneurial spirit and my passion for blending data with human insight. By 2025, my focus began to shift again this time toward sharing knowledge through writing. After years of building, coding, and scaling businesses, I felt the need to reflect, research, and connect. That’s when I started this blog. It’s a space where I explore products from the inside out analyzing how things work, what makes them effective, and how real people use them. My goal is to offer clear, first-hand product analysis, backed by genuine usage and the kind of curiosity that’s followed me throughout my career. 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