Specifications: Size: White sticker (length x width): 4.0cmX1.55cm (1.57”X0.61”) Black sticker (length x width): 3.9cmX0.85cm (1.54”X0.33”) Instructions: 1. Wash hands and clean the keyboard before pasting piano stickers. 2. Depending on the size of your keyboard, stick the corresponding stickers on the keyboard from left to right, according to the numerical order in the installation manual. 3.The piano key stickers are reusable and you can change the position at any time. Apply the keyboard stickers in the following order: 88 keys piano: Black keys(1-36), White keys(1-52) 61 keys piano: Black keys(7-31), White keys(10-45) 54 keys piano: Black keys(7-28), White keys(10-41) 49 keys piano: Black keys(7-26), White keys(10-38) 37 keys piano: Black keys(12-26), White keys(17-38) Package: 1* Piano Keyboard Stickers