RIVALLAN SIZE SYSTEM™
Measure, calculate, and compare your size using the Rivallan Bra Size Finder. Use the calculator below, then confirm your recommended fit with the size charts.
Scroll horizontally to see more sizes.
| Alpha Size | XXS | XS | S | M | L | XL | XXL | 1X | 2X | 3X | 4X |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Band/Cup Size | 28A - 28E | 30A - 30E 32A - 32B |
32C - 32E 34A - 34C |
34D - 34E 36A - 36C |
36D - 36E 38A - 38C |
38D - 38E 40A - 40C |
40D - 40E 42A - 42C |
42D - 42E 44A - 44C |
44D - 44E 46A - 46C |
46D - 46E 48A - 48C |
48D - 49E 50A - 50C |
Scroll horizontally to see more sizes.
| Alpha/Cup Size | XS (A-B) | XS (C-E) | XS (F-G) | S (A-B) | S (C-E) | S (F-G) | M (A-B) | M (C-E) | M (F-G) | L (A-B) | L (C-E) | L (F-G) | XL (A-B) | XL (C-E) | XL (F-G) | XXL (A-B) | XXL (C-E) | XXL (F-G) | 1X (A-B) | 1X (C-E) | 1X (F-G) | 2X (A-B) | 2X (C-E) | 2X (F-G) | 3X (A-B) | 3X (C-E) | 3X (F-G) | 4X (A-B) | 4X (C-E) | 4X (F-G) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Band/Cup Size | 30A - 30C 32A - 32B |
30D - 30E | 30F - 30G | 32A - 32B | 32C - 32E 34C |
32F - 32G | 36A - 36B | 36C 34D - 34E |
34F - 34G | 38A - 38B | 38C 36D - 36E |
36F - 36G | 40A - 40B | 40C 38D - 38E |
38F - 38G | 42A - 42B | 42C 40D - 40E |
40F - 40G | 44A - 44B | 44C 42D - 42E |
42F - 42G | 46A - 46B | 46C 44D - 44E |
44F - 44G | 48A - 48B | 48C 46D - 46E |
46F - 46G | 50A - 50B | 50C 48D - 48E |
48F - 48G |
To get the best fit within our Alpha/Cup size range, find your usual size (XS–4X), then find your usual cup size (A–G). For example, if you typically wear a size Medium and are a C cup, the “M (C–E)” should be your perfect size.
Cup size options: A, B, C, D, E (DD), F (DDD), and G (DDDD).
The straps should feel secure without digging into your shoulders. You should be able to slide two fingers comfortably between the strap and your body.
If the straps feel too loose, you may need a smaller size. If they dig in or feel restrictive, trying a larger size may create a better fit.
The band should feel snug and stable without being overly tight. You should be able to fit two fingers comfortably between the band and your body.
Raise your arms overhead to test the fit. If the band rides up or shifts out of place, the size may not be right.
Try a few small jumps or movements. Your chest should feel stable with minimal bounce, and the bra should stay comfortably in place.
If you notice too much movement or the fit doesn’t feel secure around the neckline or underarm, it may be worth trying a different size or support level.