They are sister sizes, meaning interchangeable. It depends on how you want the bra to fit. Say your band measures at 36.5 inches and your bust measures at 41.5 Inches there is a 5 inch difference between the two so an inch for every cup size (a,b,c,d,dd). If you try in the 36dd and it is a little tight around the band you could go up to a 38d to make it more comfortabl.
My guess is 36D or 36DD. Been into some 36C and those look bigger!
36DD
38D
She wears 36DD.
16D
38D
38d
36DD or 36E
get out of here pervert!
~im 36B ~i'm 38D
ashleys is a size 36dd in his bra size
No , D & F are two different bra sizes