After-sale protection: If you have any questions, please contact us. Thank you. Works On All Smooth Surfaces: These water bottle waterproof stickers are ideal for your laptops, computers, keyboards, water bottles, scrapbooks, mirrors, notebooks, journals, luggage, skateboards, snowboards, bicycles, cars, guitars, and more. Premium Material: All the vinyl stickers for laptop made of high quality vinyl with sun protection and waterproof, bring you more waterproof performance. Best Gift :Fantastic gift solution for Kids Student teens, adults. Stickers: There are 50PCS Birthday Party stickers in total. The pattern of each sticker is unique. The size of the stickers are about 1.96-3.15inch.