Welcome to EXD. I'm sure some of the audio heads can answer this question a bit better than me.
His other thread was locked for being similar, but stated there he wanted the trunk dimensions, not specs for sub space. Like I said measure the trunk out and figureout where you want to go from there. Once you figure out how bulky a box you want to put in, you should also factor in the amount of required air space you'll need for the given subs.google.com
find your subs online, and check what the recommended box dimensions are for your type of sub.