Great for First Grade
This finally arrived and is PERFECT for my first grader. The straps are about 2 inches across and the length hits right above his behind. Though it is wide enough it BARELY accommodates the height of his two notebooks though and is kind of "dog earing" them. I don't imagine it will work for him after elementary though as it is WAY too small for the books, supplies and other stuff you need after K-6 is complete.