Jansport big student usually works but with not much room for anything else in that pocket. Known from experience.

Jansport. However those 3 inch three ring case it binders are very heavy when you start putting stuff inside of them. My DD finds it easier to put her computer in her backpack and carry her binder separately. She says otherwise it just puts a big strain on her back. I wish her school allowed rolling backpacks, but they don’t.