What size tank for a Coastal/Jungle Carpet Python Hatchling?

I have a cage clamp thing on each side of the lid to secure it down. A couple more questions. He has found himself a perch right under the light on the branch, and doesn't ever move from there. I check his body temp with my temp gun, along with the temp of the branch and floor and stuff. His temp sits in the high 80's, so I think that is fine right? My question is is it ok that he just stays there and doesn't move? I am more nerves about him being in a good setup since he has not eaten yet since hatching. I am going to put an appropiate size mouse in there this weekend and see if he will eat.

Sorry for delays, has he taken food yet? Carpets will typically stay under a light all day if they can, especaily if its their favorite perch. Mine will typically do that till the lights go out, then its off to explore and hunt. Remember they are nocturnal by nature, so don't expect them to always be on the move. Staying in one place all day long is quite normal.

No, he still hasn't taken food yet. I moved him to my bedroom where there is less going on, he was in the livingroom. He retreated into one of the hides, the one on the UTH side, I still have the lamp on the tank too, my house stays pretty cold. I have a thermometer probe inside the hide with him to keep an eye on the temps. It stays between 88 to 90.5 degrees. I saw him out on his branch suring the night, but he spends his days in the hide. I offered him food the other day but he didn't take it. I admit I am stressing about it a little. But I will keep trying every few days. I am using live ASFs, I would use mice but I haven't had any born recently, so I am still waiting for a litter to be born to grow out big enough to offer him. And no one sells live baby mice around here, just F/T ones. I am hoping he will take food soon. His temps seem right, so I am just waiting:)

I've seen some baby carpets go 4-5 weeks before taking their first food. Don't overstress the snake trying to get it to take food though. Make sure you leave him alone for a few days, and then offer food again to see what happens. You can always try a F/t but the chance of him starting on f/t is very slim.