SODKK Acoustic Sticker – professional grade sound reduction at a fraction of the cost! Product Highlights: Material: 100 % Brand New Panel Tiles and Made by eco-friendly Polyester Fiber Color: As seen on photo. Helps to flutter echoes and reduce excess reflections and reverberation Size: 41""x86""/105 x 220cm (fit for doors with width less than 105cm) Package included: 1 pieces art door stickers. It is a DIY product, it should be put and cut together by yourself. How to use: 1. Remove the door handle 2. Clean the surface well 3. Tape artwork to the door 4. Slowly peeling the back sheet downwards 5. Peel and stick all the way 6. Cut off the excess part 7. Enjoy your life.