They simply should not make uniforms over a certain size. If they do, make them pink. They can wear pink until they get into proper fighting form.
The two that are US military are definitely reserve because active duty there are actual military regulations that must be followed. The reserve there's a lot of undisciplined turds that don't give to shits about military regs. Having been full active duty my four years.. My impression of reserves is that they are the biggest pieces of shit to ever serve the military and have zero right to wear the uniform.. In my fullest opinion reserves should be given their own uniforms to mark them apart from full active duty and should be below that of full active duty regardless of rank.