****PLEASE TAKE NOTICE: I wrote this produce about legging tights that was called "LEGGS SILKY TIGHTS, BLACK, Size B", not about the bras. The sellers must have used the same listing page but changed what they're selling? So I'm sorry for any inconvenience but this product review was NOT about a bra..

I have not used this product yet, but I wanted to specify the sizing since I just guessed at what size to get.
Size A: 4'10" 105-130lbs
  4'11" 100-135lbs
  5'0"  95-140lbs
  5'1"  90-145lbs
  5'2"  85-130lbs
  5'3"  85-125lbs
  5'4"  90-120lbs
  5'5"  95-115lbs

Size B: 5'2" 130-150lbs
  5'3" 125-155lbs
  5'4" 120-160lbs
  5'5" 115-165lbs
  5'6" 100-165lbs
  5'7" 100-165lbs
  5'8" 105-160lbs
  5'9" 110-150lbs
  5'10" 115-145lbs
  5'11" 120-140lbs

Size Q: 5'0" 140-180lbs
  5'1" 145-185lbs
  5'2" 150-190lbs
  5'3" 155-195lbs
  5'4" 160-195lbs
  5'5" 165-195lbs
  5'6" 165-190lbs
  5'7" 165-185lbs
  5'8" 160-180lbs
  5'9" 150-175lbs
  5'10" 145-170lbs
  5'11" 140-170lbs
  6'0" 140-165lbs

Sorry if I messed up any numbers, but it won't be to the point to mislead anyone.
Hope this helps!