Backpack Size Guide – What Size Backpack Do I Need?

A backpack is an essential item for school, work, travel, and more. Here are guidelines on what size backpack you need.

When you go to buy a backpack, the first thing you want to do is figure out what size you need. This is one of the most important things to consider when buying a backpack because it will impact how much stuff you can carry. If you’re not sure what size to get, this post will help you learn about different backpack sizes and which pack is most suitable for your needs.

laptop bag size chart

Size Size on Average Ideal for Dimensions What Fits Inside
20L Medium Backpack School and college, Camera backpacks , Work and gym backpacks 45 cm; L 28 cm; D 23 cm Large headphones,Small book,2x hoodies or sweaters ,Water bottle,2x 1-inch binders,Up to 15.6 laptop,
25L Medium Backpack School and college, Camera backpacks , Work and gym backpacks 23 X 18 X 40 cm Large headphones,Water bottle,Small book,2x hoodies or sweaters,DSLR camera insert,2x 1-inch binders,Up to 15.6” laptop.
30L Large Backpacks Extra large school backpacks, Travel backpacks, Large laptops up to 17 to 18 inch 406.4 x 533.4 x 177.8 mm Large headphones,Water bottle,Small book,2x hoodies or sweaters,DSLR camera insert,Large textbook,2x 1-inch binders,Up to 16” Laptop.
35L Large Backpacks Extra large school backpacks, Travel backpacks, Large laptops up to 17 to 18 inch 406.4 x 533.4 x 177.8 mm Large headphones,Pencil case or dopp kit,Water bottle,Pair of shoes,2x hoodies or sweaters,Small books,2x 1-inch binders,DSLR camera insert,Large textbooks,Up to 17” laptop