What regulation covers barracks bed size?

Sleeping bag with or without a woobie and I'm set.

I !EAM, I suppose there's gotta ne something I've been around too much science to not realize that there must ne science to it, and regs, however, ya gotta admit, at first glance it is a rather offbeat question, you kmow? I've gotta give that one some really serious thohght. I')) admit, ya got me on that one, honest....

Uhh...jaw drops, swings back and forth on its hinges...uhh...like as in, say what?

AR 210-50