Personalized World's Best Great Grandpa Women's V-Neck T-Shirt. Great Grandpa Women's V-Neck T-Shirt - White gift has World's Best Great Grandpa logo on a Father's Day gift for him. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit