I know the ribcage of a (cis) male is often bigger and wider than that of a (cis) female. And i also know that a early hormone treatment may stop the shoulders and ribcage from expanding.
But i think there's a possibility, that genetics play a bigger role than hormones.
Even with the female hormones in my System (started at Age 12 now 18), i developed (i think) broad shoulders and a wider ribcage.
My shoulder width is 16.5 inches and my rib-cage width 11.4 inches (across!) and my height is 5'6.
Im very self conscious about my Body.

Maybe im overreacting a little bit, so that's why i want to know your:
-Shoulder width
-Ribcage width (across)
-Height