I've bought different "Posture gizmos" to wear, moreso straighten up the spine, (but, so far, they rub, & cut under the arms).
I saw a demo of yet another of one of these Posture Gizmos the other day, that maybe will work? Or maybe I can wear over thick clothes? And/Or use underarm pads? or pad the item's underarms of the gizmo?
Perhaps one of these will stretch out my spine, which Im guessing is where some of my inches are hiding?? (well, and knees, neck & hips..)

The Demo of this above, showed it to be a 2 step process in applying this Posture Gizmo, of which didnt seem to instruct in others. Just hope for at least *some* of my inches back! Maybe retrieve 2" of my displaced inches? or 3"?
(Also, Im VERY VERY "top heavy," disproportionately, imho, that doesnt help. I often relate my total physique to a large scoop, of Ice Cream, atop an Ice Cream Cone. That weight doesnt help in straightening up).
"Don’t forget to be kind to strangers, for some who have done this have entertained angels without realizing it!" (TLB)