Irideon sizes are based on American Sizes. As you can see, there are some gaps in Irideon's sizing chart. For example hip measurement 48" is not covered. However, these high quality fabrics have a substantial 'stretch' element, and re-shape well, so please pick the size which most closely approximates your measurements.
From experience, 16 Plus Rider advises that an XL is approx a British size 16/18, 1XL is an 18/20, 2XL is a 20/22.
| American: | XL | 1XL | 2XL | 3XL |
|---|---|---|---|---|
| Bust | 40.5 - 42" | 42.5 - 44.5" | 46.5 - 48.5" | 50.5 - 52.5" |
| Waist | 33.5 - 35" | 35.5 - 37.5" | 39.5 - 41.5" | 43.5 - 45.5" |
| Hips | 43.5 - 45" | 45 - 47" | 49 - 51" | 53 - 55" |