The smalls are great for a hatchling the size of yours, but like others have said they will outgrow it quickly. I start off with a small and then I graduate them to an intermediate sized homemade hide (Target plastic bowl). Eventually I graduate them to the medium hide. That will last until your BP is approximately 1200grams. Then I bump to the large hide (bigger than I prefer at 1200g but it's what I have.. Lol). I love RBI hides, I just wish they had more intermediate sizes.