females should be at least 65 grams and over one year old before they are bred. they should have nice fat tails and fat pockets in their armpit areas before being bred so their bodies can sustain each clutch of eggs. males don't have to be quite as large or as old, but should be close in size to the female to avoid aggression. as long as they are close in size there normally isn't an issue with aggression but you will want to supervise the introduction and keep an eye on them for the first 24-48 hours. occasionally a male will be overly aggressive during this time. the normal breeding season for leos begins in february to early spring. here is a good guide to leo morphs: http://www.leopardgeckowiki.com/wiki...ategory:Morphs.