So, my BMBH measured around the curve on the hammock bottom, and across the air space to meet in the middle ( not trying to drape down to the bottom where you would be laying) was 77" on the ends. Plus a little more if you try and cover the spreader bars.
Comparatively, a Peapod is 72 inches at the widest point, though much more narrow than that on the ends. Also it's 9 foot length allows you to close it off pretty close to the end with most hammocks, without stretching it too tight and reducing internal room. Even beyond the ends on the Claytor expedition. but once you get serious about stuffing other insulation in there with you – and if you're pretty big boy – then the Polar Pod ought to get the job done. With this extra 1.5 feet of length and width! If I have the specs right, 90 inches of girth! That should swallow everybody and their hammock and some extra insulation, other than maybe a bridge hammock. (actually, I just got up and went outside and measured on my bridge hammock: 77 inches circumference around the outside of the hammock meeting in the middle (need a couple of inches more to cover the spreader bars). 73 inches around the middle including going around my under quilt, though I pulled it tight enough to compress most of the down. So it looks like something of about the size of the Polar Pod might even be somewhat usable with a JRB Bear Mountain Bridge Hammock!