Sorry missed that question Rich. The female is about 7.5" and the male is around 5" on the goliath bird eaters. That camel spider was an easy transfer. I put its old cup in the new bigger cup pulled the lid off and slapped the big cups lid on. So yea theres a little cup still in there for it to play on. Lol. The biggest stress was actually transferring the H. Macs. Got 4 that are 2+" if you want them as we discussed you don't have to take that many. Just got that many extra. I'm really liking them! Hate to give Mike a big head but he's right baboons are awesome! I've got to find some wholesale lots of pokies tho. Lots of request for them!