boa Question

ive been wanting a arboreal boa for a while but i want to be able to keep it in a sixty gallon tall tank that ive been working on for a few months. i was wondering what were some species of boa that are arboreal but stay small?

Amazon tree boas are relatively small for boas, around 6 or so feet for a big one and pretty slender bodied.

Most boas are semi-aboreal, and most Central American and Mexican boas stay under six feet. I have a pair of Sabogae "Pearl Island" boas in 3x2x2 cages with perches, and they use their perches quite a bit.