Best One Size Backpacks of 2025

John Zimmer Avatar
John Zimmer
Last Updated: 5 Feb 2025

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One size backpacks are versatile and convenient bags that can be used for a variety of purposes. They are designed to fit most people and provide ample space to carry your belongings. These backpacks come in different styles, colours and materials to suit your needs and preferences. Whether you're going on a hiking trip, commuting to work or school, or simply running errands, a one size backpack can help you organise your items and make your journey more comfortable. With their adjustable straps and multiple compartments, these backpacks provide a comfortable and secure fit for all your adventures.

At a Glance: Our Top Picks

adidas Unisex Badge of Sport Backpack Cover #TOP 1
adidas Unisex Badge of Sport Backpack
ftb score rating icon 9.9
ellesse Rolby Navy Backpack - One Size Cover #TOP 2
ellesse Rolby Navy Backpack - One Size
ftb score rating icon 9.8
adidas Unisex Power Backpack in White/Black Cover #TOP 3
adidas Unisex Power Backpack in White/Black
ftb score rating icon 9.6

Top 10 One Size Backpacks

adidas Unisex Badge of Sport Backpack

L9583
Black / White
One Size
adidas Unisex Badge of Sport Backpack Cover
adidas Unisex Badge of Sport Backpack, Black/White, One size

The adidas Sport Backpack offers a spacious 27.5-litre capacity, perfect for carrying your essentials comfortably. With dimensions of 15 cm x 36 cm x 44 cm, it is designed to fit your belongings without compromising on style. Made from 100 percent recycled polyester, this backpack is environmentally friendly, ensuring you can carry your gear with pride. The padded construction provides added comfort, making it suitable for everyday use, while the zip main compartment and front zip pocket offer easy access to your items, enhancing your convenience on the go.

What We Like
Spacious 27.5-litre capacity
Environmentally friendly materials
Padded for comfort
Multiple zip pockets
Stylish design
#TOP 2

ellesse Rolby Navy Backpack - One Size

SAAY0591
Navy
One Size
ellesse Rolby Navy Backpack - One Size Cover
ellesse Rolby Backpack - Navy, One Size

The ellesse Rolby Backpack is a stylish and practical choice for anyone in need of reliable storage. Its navy colour adds a touch of sophistication, making it suitable for various occasions. The backpack is designed to be easily maintained; simply wipe it with a damp cloth for a quick clean. With a one-size design, it offers versatility for different users, providing ample space for your essentials without compromising on comfort. This backpack is perfect for daily use, whether for work, school, or leisure activities.

What We Like
Stylish navy colour
Easy to clean
One-size fits all
Versatile for daily use
#TOP 3

adidas Unisex Power Backpack in White/Black

HB1324
Black / White
One Size(24L)
adidas Unisex Power Backpack in White/Black Cover
adidas Unisex Power Backpack, White/Black, One size

The adidas Power Backpack offers a practical design with its dimensions of 19 cm x 30 cm x 46 cm and a generous volume of 24 litres. Made from 100% recycled polyester, both the shell and lining are eco-friendly, helping you make a sustainable choice. Multiple zip compartments ensure that you can organise your belongings easily, keeping everything in its place. Additionally, the side mesh pockets are perfect for quick access to items like water bottles, making this backpack an ideal companion for your daily adventures.

What We Like
Eco-friendly materials
Multiple storage options
Convenient side mesh pockets
Spacious design
#TOP 4

adidas Classic Badge Sport Backpack, Shadow Navy

L9583
Shadow Navy / White
One Size
adidas Classic Badge Sport Backpack, Shadow Navy Cover
adidas Unisex Classic Badge of Sport Backpack, Shadow Navy/White, One size

The adidas Classic Backpack is designed for convenience and style. With dimensions of 15 cm x 36 cm x 44 cm and a generous volume of 27.5 litres, it offers ample space for your belongings. Made from 100 percent recycled polyester, it is an eco-friendly choice, allowing you to carry your items responsibly. The zip main compartment ensures your items are securely stored, while the front zip pocket provides quick access to smaller essentials, making it perfect for daily use or outings.

What We Like
Eco-friendly materials
Ample storage space
Secure zip compartments
Convenient front pocket

ellesse Regent Black Mono Backpack

SAAY0540
Black Mono
One Size
ellesse Regent Black Mono Backpack Cover
ellesse Regent Backpack - Black Mono, One Size

The ellesse Regent Backpack is a spacious and stylish choice for your adventures. With secure zip fastenings, you can be confident that your belongings are safe. The padded, adjustable shoulder straps ensure comfort during long outings, making it easier for you to carry your essentials. Additionally, the backpack features a handy carry handle for quick lifts, adding to its versatility. With a printed ellesse logo and multiple pockets, this backpack combines functionality with a trendy design.

What We Like
Spacious design for essentials
Comfortable padded shoulder straps
Secure zip fastenings
Convenient carry handle
#TOP 6

Everlast NYC Black Backpack for Daily Use

Black
One Size
Everlast NYC Black Backpack for Daily Use Cover
Everlast NYC Backpack Black One Size

The Everlast NYC Backpack is perfect for daily life, school, and short trips. With a size of 32x15x46 cm, it provides ample space for your belongings. The backpack features a generous main pocket with a zipped closure, ensuring your items stay secure. An internal padded laptop pocket is included, protecting your device while you're on the go. The woven carry handles and two adjustable shoulder straps add flexibility, making it comfortable for you to carry, no matter your preference.

What We Like
Spacious main pocket
Padded laptop pocket
Adjustable shoulder straps
Durable polyester material
Easy access with U-shaped pull

Kipling Women's City Pack Mini Backpack, Grey

KI267089L
Grey Gris
One Size
Kipling Women's City Pack Mini Backpack, Grey Cover
Kipling Women's City Pack Mini Backpacks, Grey Gris, One Size

The Kipling City Pack Mini is designed for convenience and style. It features adjustable backpack straps, allowing you to customise the fit for comfort during your daily outings. With two side pockets secured by magnetic stud fastenings, you can easily access your essentials while on the go. The zipped front pocket provides additional secure storage for smaller items. Plus, the front flap with a magnetic stud fastening covers a drawstring pocket, offering extra space for your belongings when you need it.

What We Like
Comfortable adjustable straps
Secure side pockets
Convenient zipped front pocket
Stylish design

Nike Elemental 2.0 Black and White Backpack

DD0559 WEB
Black and White
One Size
Nike Elemental 2.0 Black and White Backpack Cover
Nike Elemental 2.0 Backpack (One Size, Black/White), Black and White

The Nike Elemental 2.0 Backpack is designed with practicality in mind. Its spacious main compartment features a double zip, allowing you to store your belongings easily. Additionally, multiple easy access pockets help keep your items organised and within reach. The padded shoulder straps and back provide breathability, ensuring comfort during use. Moreover, the versatile carrying strap offers a convenient transport option for your daily activities, making it suitable for a variety of occasions.

What We Like
Spacious main compartment
Multiple easy access pockets
Padded for comfort
Versatile carrying options
#TOP 9

Under Armour UA Hustle Lite Backpack

1364180
Black
One Size
Under Armour UA Hustle Lite Backpack Cover
Under Armour Unisex UA Hustle Lite Backpack Backpack

The UA Hustle Lite Backpack by Under Armour is designed to meet your daily needs with its practical features. It includes a zippered front valuables pocket, perfect for keeping your important items secure and easily accessible. The soft-lined laptop sleeve accommodates a 15" MacBook Pro or similar laptop, ensuring your device is protected while on the move. Additionally, the durable PU-coated bottom panel adds an extra layer of protection, making it suitable for various environments. This backpack is ideal for anyone seeking functionality and style in their daily carry.

What We Like
Secure valuables pocket
Protective laptop sleeve
Durable construction
Stylish design
#TOP 10

BagBase Military Green Roll-top Backpack

159419
Military Green
One Size
BagBase Military Green Roll-top Backpack Cover
BagBase Roll-top Backpack, Military Green, One Size

The BagBase Roll-top Backpack is a practical choice for anyone needing a reliable bag for daily use. Made from durable 600D polyester, it offers excellent resistance to wear and tear, ensuring longevity. The padded laptop compartment is designed to keep your device safe, accommodating screens up to 15.6 inches. Additionally, the reinforced back panel and base provide added support and comfort, making it easier for you to carry heavier loads. With dimensions of 32 x 44 x 13 cm, it is spacious yet compact for various needs.

What We Like
Durable polyester material
Padded laptop compartment
Reinforced for added support
Spacious yet compact design
Buying Guide Image
Editor's Notes

During our one size backpack research, we found 306 one size backpack products and shortlisted 10 quality products. We collected and analyzed 32,663 customer reviews through our big data system to write the one size backpacks list. We found that most customers choose one size backpacks with an average price of £22.82.

The one size backpacks are available for purchase. We have researched hundreds of brands and picked the top brands of one size backpacks, including adidas, ellesse, Everlast, Kipling, NIKE. The seller of top 1 product has received honest feedback from 2,961 consumers with an average rating of 3.7.

Written by
John Zimmer Avatar

John Zimmer is a truly professional writer on findthisbest.com. He has specialized in writing content a wide variety of fields for over a decade. Since 2011, he has been using his expertise and extensive experience to write content for online shopping guide websites. In addition to writing for findthisbest.com, he has appeared in publications such as The Spruce, Wirecutter and Bestbuy.