How old is silver and blaze in sonic

Silver is 14. Blaze is 14. and Sonic is 15 or 16. Are you sure because rouge the bat is 18 and Shadow would be the same age as Sonic but that would just look wierd since they hang out and Roge flirts a lot. plus it would be really wierd if there was a world with a 14 year old princess but you never know because a 14 year old princess would be epic.