The basic rule is 1 inch a cup 2 inches b cup 3 inches c cup 4 inches d cup and so on.
Best way to measure bra size at home.
Round the measurement to the nearest whole number and you ve got your band size.
While braless or wearing a non padded bra use a measuring tape to measure around your torso directly under your bust where a bra band would sit.
To find the cup size you will have to subtract the band size measurement from bust size measurement.
Match the number to this bra size chart to determine your cup size.
Depending on the manufacturer you may need to add four if the measurement is even and add five if the number is.
The number that the end rests on is your band size.
If the measurement is an even number add four and that.
Round to the nearest whole number.
For example 35 inches bust 34 inches band 1 inch.
If your bust size is 34 and band size is 33 that s a one inch difference.
Measure your cup size.
Measure your band size first.
You should do this at least yearly.
Using the number that you measured around your rib cage you can easily determine the best band size for your new bra.
To find your band size measure around the bottom of your bust directly under your breasts.
To find out your bra size all you need is a measuring tape or a piece of string or ribbon and a ruler.
If you are not on an even number then round down to determine your band size.
Subtract your band size from your bust measurement to find your cup size.
The tape should be level and very snug.
So we would bring a 34c to the dressing room to start.
We love this method to get you one step closer to a great fitting bra.
The difference of 1 represents a cup size so your bra size will be 34a.
Combine the band size with your bust letter to get your bra size.
The calculations when learning how to measure your bra size correctly at home calculate the difference between your cup size and band size.
Check where the end of the measuring tape overlaps the tape in the front of your body.
As you know most bras are sized via band then cup i e a 34 d bra is a bra with a band measurement of 34 and a cup measurement of d.