Okay, so I want to buy a lizard but I don t want it to be anything too small or big, so what s the best decent size lizards?(I own reptiles)?

Tegus are definitely not in between small and big; they are advanced level animals for experienced keepers only and reach at least 3' (smaller end) to 4.5' (larger end). If you're aiming for something in the 1' range (keep in mind this includes the tail), I would aim for a couple common starter geckos that have been mentioned, as well as Uromastyx, Steppe Runners, and Emerald Swifts. If you're looking in the 1' - 2' range, Bearded Dragons, Chuckwallas, and Blue-Tongued Skinks are good starter animals.

Some decent sized lizard include:

Anoles

Leopard Geckos

Crested Geckos

African Fat Tailed Gecko

Bearded Dragon ?

Tegu ?

I marked the bearded dragon and the tegu as a question mark because I did not know whether they would be the size that you are looking for.

I would say a leopard gecko, crested gecko, bearded dragon (biggest in the list but get a little less than 2 feet