Trying to determine the right cage size for a “full grown” boa is like trying to determine the right shoe size for a “full grown man”. I don’t want to brag, but some men are bigger then others LOL, and some boas are bigger then others too. I use the rule of thumb as 1 sq foot of cage floor space for every foot of length on the boa. Now this would be a minimum space, bigger is always better, but not always more efficient.
So if your full size boa in 8 feet or smaller then a 4x2 foot cage would provide you with the needed 8 square feet of space. If you boa exceeds 8 feet (I have a 9 footer and a 10 footer) then a 6x2 foot cage would be much better suited for the snake. This year I plan on getting a stack of Jeff Ronne’s 4x2 foot cages with the added on 2x2 foot blinds to make a 6x2 foot cage. As far as height goes, adult boas don’t climb much. My first group of custom cages that I got are 16” high, but 12” high cages are plenty, as the boas just don’t use the vertical space. The 3’ high cage would be a waste of space for me (I also have 40 full time snakes and currently 120 babies/offspring in my snake room so space is always at a premium.
I hope this info helps, Be careful with the Plywood, pressure treated wood is bad for the snakes, and most of the wood absorbs the urine and other orders as well as being hard to keep clean and disinfected.
Good Luck
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Jim Hopkins "Hoppy"
Hopkins Holesale Herps
Hopfam1@aol.com