they are all about the same height. they are on 18/6 and teh one female has wow wonderful nice white hairs 2 of them on every catylx. maybe the others are just slow? or might they be males? males usually show first? they might have small lil things but i canttell it looks liek teh hairs it just has no hair oh well i will have to wait. do the males show with the 18/6?