It's very hard to tell Veiled Chameleon ages by size since they're so variable depending on husbandry. As one example, my young male had just turned five months old in this photo:
I'm a big skink fan, and I love creating bioactive enclosures, so I always figured they would be a good fit. I'm glad you recommend them so highly. They seem to have such cute faces and I think they're one of the most beautiful reptiles out there.