Medium size. Well loved and gently used jansport backpack. An older model but still has a lot of life left in it. All zippers work. Lightweight and perfect size to fit lap top, lunch, notebooks and items needed for a day at work or school. Not large enough for a lot of textbooks and no water bottle holder. I still own another large size jansport backpack from 2010, so that’s a testament to how well they hold up.