This is a very creative and colorful sticker set. The color of the sticker changes with the weather. It is suitable for sticking on the inside of the window . It can not only greatly reduce the probability of the window being hit by birds, but also look more colorful, adding warmth and fun to your home. This sticker is an electrostatic sticker, no glue is required, just spray water to stick it. Includes 2 stickers, each size: 30 cm x 22 cm (11.8 inches x8.6 inches). The sticker can be pasted on any clean glass. If you have any questions during use, please feel free to contact us and we will get back to you as soon as possible.