Thickness: Approximately 1.5 cm This is a handmade item. Suitable for a wide range of small to medium-sized birds (budgies, Java sparrows, lovebirds, cockatiels, etc.). Can be attached to the side or top of the cage (fixed, so it doesn't swing). You can use it in any way you like. Hoping your beloved bird and you have a wonderful time together! ☆*:.。. o(≧▽≦)o .。.:*☆