Friendly Reminder: 1.You can quickly cut the sheet according to your tank’s requirement in the desired shape and size. 2.To make sure you could get the most suitable size, please measure the width and height of the fish tank. 3.The aquarium background is usually pasted outside the aquarium, not in the water. 4.Because of the different width and height, the picture will have different degreess of stretching. 5.Please allow 1-5mm error due to manual measurement. Installation Method: (Or refer to the pictures) 1.Clean the glass on the back of the fish tank at first, and then spray the water on the glass uniformly 2.Open the surface protection film 3.Stick the product on the fish tank (One side of the product has a slight stickiness) 4.Use a ruler to squeeze out water and bubbles Package Included: 1x Aquarium Background Sticker(Others Not Include)