The door knob stopper size: 5cm/2" in diameter and 1cm/0.4" in thickness. Each weighs 10g/0.35oz. The door knob bumper is made from durable silicone, which is soft and resistant to impact. The wall door bumper prevents handles or knobs causing marks, scratches, cracking or serious damage to the adjacent walls if knocked repeatedly. It can also reduce the noise travel from direct contact between the walls and handle.Each door wall bumper has a self-adhesive backing. Easily peel off the sticker and attach to the wall directly in line with the level of the door handle contact. Can also be used to protect the wall from furniture, such as tables, free standing cabinets, fridges, toilet seats, cupboards and more. The wall protector door stop is ideal for bedrooms, bathrooms, in the kitchen, at the office, schools and more. Suitable for adhering to smooth, flat, clean surfaces. Please note - the nature of the strong adhesive means it may mark the surface when trying to remove. Each door knob bumper pads has a self-adhesive backing. Easily peel off the sticker and attach to the wall directly in line with the level of the door handle contact. Can also be used to protect the wall from furniture, such as tables, free standing cabinets, fridges, toilet seats, cupboards and more. The door handle bumper guard is ideal for bedrooms, bathrooms, in the kitchen, at the office, schools and more. Suitable for adhering to smooth, flat, clean surfaces. Please note - the nature of the strong adhesive means it may mark the surface when trying to remove.