I was looking for an inexpensive roller backpack that was deep and wide enough for my five classes of books plus 2 inch binders for each class. They all fit amazingly well and I can take it to the library without hurting my shoulders, neck or back. I am bias to this item because I love polka dots. The price is so good compared to jansport backpacks on wheels that go for up to ****. Love it, love it, love it!!!