Transform® Sizing Chart: How to Choose and Fit the Correct Breast Form and Bra

Measure to Determine your Bra Band Size

  • Using a tape measure, measure around the rib cage under the pectoral muscles where the natural breast tissue joins the body.  Take a snug measurement.  (This would be where the band of the bra fits around the chest.)
  • Add 5 inches to this measurement.
  • Example:  Chest Measurement = 36", Add 5" Estimated band size = 41".
  • Bra bands come only in even numbers, so this person would have to go up or down in size.

Choose a Cup Size 

  • The Band Size stays the same, no matter how large or small you want your breasts to be. For the size of the breasts, choose a cup size letter.
  • Consider height, weight, and figure style.  If you are 5'10" tall and a 42-46 bra size, generally choose a C, D, or DD cup bra.  If a size 34, 36 or 38 bra, choose a cup that balances the figure like a B or C cup.  If you choose a cup size that is too large for a small frame, it may be harder to buy clothes.  If you choose a cup size that is too small, and you have wide shoulders, or a big waist, your forms will not fill out your clothes.

If you know your best ladies' dress size, use the chart below to find a suggested cup size.  Everyone is different, but the suggested sizes are a great place to start.

Shirt Size Ladies' Dress Size Suggested Cup Size
  0 A
SMALL 2 A
4 A or B
  6 B
MEDIUM 8 B or C
  10 C
  12 C
Large 14 C or D
  16 D
X Large 18 D or DD
  20 DD
  22 DD
2X Large 24 DD
  26 DD

 

After you choose your cup size, use the chart below to find the corresponding breast form size.  Breast form sizes vary by style with some up to size 14.  See individual product descriptions. 

Bra Sizing Chart

32

(70 cm)

34

(75 cm)

36

(80 cm)

38

(85 cm)

40

(90 cm)

42

(95 cm)

44

(100 cm)

46

(105 cm)

48

(110 cm)

50

(115 cm)

A 1/2 2/3 3/4 4/5 5/6 6/7 7/8 8/9 9/10 10
B 2/3 3/4 4/5 5/6 6/7 7/8 8/9 9/10 10 11
C 3/4 4/5 5/6 6/7 7/8 8/9 9/10 10 11 12
D 4/5 5/6 6/7 7/8 8/9 9/10 10 11 12 13
DD 5/6 6/7 7/8 8/9 9/10 10 11 12 13 14

Putting Forms Into a Regular Bra

  • Lengthen the bra strap on one side.
  • Pull the cup away from the chest wall.
  • Insert the form from the inside top of the cup.  Turn the form in the direction that best fills the bra cup and looks the most natural.  Repeat on the other side.
  • After forms are in place, adjust the straps on each side.
  • Look at the fit.  Both sides should match and the bra cups should cover the prosthesis completely.  The prosthesis top tapers should prevent clothing from sinking in.  Each form should fill and not bulge at the top of the cup; plus, the forms should settle into the bottom of each cup.  The straps should not cut into the shoulders.

Putting Forms into a Pocket Bra

  • Spread the bra out on a flat surface with the inside of the bra facing you.
  • Hold the form by the edges with a flat hand so that the nipple is facing down.
  • Spread the elastic on the cup and slide the form in so that the nipple faces outward.
  • Adjust the form so it settles into the bottom of the cup.
  • Hold the bra up with the form inside the pocket to make sure it looks correct.
  • Be careful not to puncture the form or fold it. TRANSFORM® Silicone forms are very durable, but the polyurethane skin can be punctured.
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