I've got the swinging plexiglass doors on the T12 and A20s, but that sounds about right for opening size. I'll try to remember to check tonight.
That's an A20 (24" x 48" x 36" tall) on the bottom. That one houses my jungle carpet python, and we have another (just barely seen to the left) for my husband's Vietnamese blue beauty. Both boys are pretty arboreal and use the extra height.
The others in the stacks are divided T8s for colubrids and BPs.
I'll probably go with a T10, 11, or 12 for my blood python, just because they're so thick-bodied. I've seen T12s suggested for woma pythons, but mine is sooo hopelessly terrestrial I'm not sure the extra height would be much benefit.
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