Thank you for viewing. I used this for about two months, practicing once a week for about two hours each time. There are no chips, tears, or cuts in the sheet. I think it's in good condition for a used item at this price. How about it for middle school or high school students to try out? The adhesive film has been removed, so it can be used immediately. I used it on a blade size: 157 x 150mm racket.