CM? what the heck, to small of a measure. For a adult Chameleon when they get about a year old you need a 24x24x48 inch cage. when they are babies you can go smaller but you will have to buy a bigger one soon enough. Do lots of research before you buy one. There are soooo many different things you should know before buying a cham. Cage size is just the first of many things! Good luck