Its kinda hard to explain. maybe post some pics. the smallest i can sex is around 2-2.5" and it can still be tough. males will generally have alot of spotting on the body, females will look to have faded blotches unless theyre already coloring up. Ira "the wish list" has some right now at 2-2.5" and he can sex them for you, he also has small pairs starting to form. they are from my old pair