Originally Posted By PaHiker
Okay, so if I follow, here is what I get (all dimensions in inches):

Length.....72
Width......56
Sq In...4,032
Thickness...1.5
Cu In...6,048
850 Fill....7.1
Overfill....1.3
Total.......9.2


That looks about right to me and seems to match up with industry. Enlightened Equipment's 40° quilt has 1.5" baffles. The Short/Wide is 72" long and 58" at the shoulders tapering to 42" at the feet. They stuff it with 9.44 oz. of 850 down: https://enlightenedequipment.com/revelation-custom/ (click on specs and choose 40°)

Since you are not tapering you might want to bump it up a smidge more. Of course the other thing to consider is that EE considers a 1.5" baffle good to 40°. They do use internal baffling so there won't be cold spots.