Bra & Breast Form Sizing Charts
Finding the right bra size
First measure the circumference under the bust. Match the measurement to the correct bra size in Table I.
Example: 79cm measured = Bra size 80
Find the right cup size
Measure from the middle of the back (spine) across the fullest part of the remaining breast to the breastbone. Then double the measurement. Starting from the bra size identified in Table I, track down to Table II, where you can find the right cup size on the left-hand side, based on your measurement.
Example: 47cm measured, doubled = 94cm. If the bra size is 80, the cup size - according to Table II - is B.
Once you have the right bra and cup sizes, you can determine the breast form size using the Silima size table.
Finding the right breast form size
Starting from the measured cup size, track horizontally to the right to the measured bra size. In the vertical column beneath this measurement, you will find the appropriate breast form size.
Example: A measured cup B and bra size 80 equates to a breast form cup B, size 5.
During selection, please bear in mind that most Silima breast forms come in at least 2, and in some cases 3, cup sizes to ensure the best possible fit.
Silima breast forms ...
... cup A: for a small, flat bust
... standard/cup B: for the medium-sized bust
... full/cup C: for the fuller bust
... cup D/E: for a large bust
International Size Conversion
Silima products use a unique sizing guide to accomodate international customers. Each guide has been broken down into AU, US and Silima sizing. For more information please contact us directly.
Cup Size
Ready to Shop?
Now that you know your size, explore our range of Silima products designed for comfort and confidence.
🩱 Shop Mastectomy Bras
Our mastectomy bras are designed for a secure, comfortable fit with pockets to hold your breast form in place.
🌸 Shop Breast Forms
Find the perfect Silima breast form to match your size and lifestyle — from lightweight everyday forms to swimming-friendly options.
✨ Shop Accessories
Complete your look with our range of accessories, including bra care products and more.
Not sure which product is right for you? Our fitters can help — visit our Breast Form Fitters page to find expert guidance near you.