Cup Size: Subtract the measurement you got
for your Bra Strap from the measurement you got of your Bust as
described above. If the difference is up to 1" your cup
size is an A, up to 2" your cup size is B, up to 3" your
cup size is C, up to 4" your cup size is D, up to 5" your
cup size is DD or E, up to 6" your cup size is DDD or F.
Waist: Measure around your normal waist,
where the waist band of a good fitting pair of pants/skirt normally
sits, making sure not to pull the tape measure too snugly.