Official size and weight: Size 7, 29.5 inch, Proper Inflation Level: 7 -9 PSI | Made of high-quality rubber, suitable for youth and adults.Designed for indoor and outdoor use | Come with full accessories, 1 backpack,1 pump, 1 mesh ball bag, 2 Inflation Needles | Perfect Encouragement gift for Graduation Birthday Christmas Valentine's Day! Engraved words “To My son, i want you to believe deep in your heart that,you’re capable of achieving anything you put your mind to that you will never lose ,you either win or learn. Just go forth and aim for the skies. I can’t promise to be here for the rest of your life.but i can promise to love you for the rest of mine” | If you are unsatisfied in any way with this product, we will refund your money, no questions asked.