Every dot tape of this item is about 20mm in length and width which is a proper size for most things. This hook and loop can be attached to most of things, especially for smooth surfaces of paper, plastic, glass, , metal, etc. The sticky dots are really great for holding their drawings, pictures, homework projects,and even toys up. Feature - Color: White. - Material: Nylon and Polyester. - Diameter: About 20mm. - Strong adhesive, it sticks well even in wet condition. - Brightness color make it easier to see and will make you things stick to the proper place. - Easy to peel off from the backing film and stick firmly on the wall. Double sided design is more practical. - Made of quality polyester and nylon material, they are tenacious and durable. - Backing film is waterproof and can roll up without mark. - Helpful to stop carpet sliding and keep it in place. - Warm Tip: Dear buyer, due to lighting effect, monitor’s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1000 x Sticky Tapes