The badges will make your bicycles more eye-catching. Buy more get more free badges.the badges are all official sizes. If you ordered 1 badge, i will ship you 2 same badges,the price is very cheap,so i can"'"t earn any money,just make friends. So if you like it, please order 2 or more badges, so that i can earn a little bit money to make more different badges to you guys. The sizes have be written on the pictures. These badges are made of aluminum. On the front of the badge there is a protective film. On the back of the badge there is a 3m glue . You can adjust the radian by yourself. How to use: Clean the tube of your bicycle where you want to glue the badge and adjust the radian of the badge until it fit perfectly , then remove the glue"'"s sticker and put the badge on the tube and press it for seconds. When you have adjusted the badges and made sure they have fitted onto the bicycle tube, it wont fall off unless someone tears it off.