All Sizing Charts correct as of 22/02/2026.
Spectrum Outfitters Size Guides
Short and Long Binders
source: https://spectrumoutfitters.co.uk/pages/standard-binder-size-guide
| Size | Chest | Rib |
| XXS | 73.7cm – 78.5cm (29″- 30.9″) | 63.5cm – 68.6cm (25″- 27″) |
| XS | 78.7cm – 83.6cm (31″ – 32.9″) | 68.8cm – 73.7cm (27.1″ – 29″) |
| S | 83.8cm – 88.6cm (33″ – 34.9″) | 73.9cm – 78.7cm (29.1″ – 31″) |
| M | 88.9cm – 93.7cm (35″ – 36.9″) | 79cm – 83.8cm (31.1″ – 33″) |
| L | 94cm – 98.8cm (37″ – 38.9″) | 84.1cm – 88.9cm (33.1″ – 35″) |
| XL | 99.1cm – 104cm (39″ – 40.9″) | 89.2cm – 94cm (35.1″ – 37″) |
| XXL | 104cm – 109cm (41″ – 42.9″) | 94.2cm – 99.1cm (37.1″ – 39″) |
| 3XL | 109cm – 114cm (43″ – 44.9″) | 99.3cm – 104cm (39.1″ – 41″) |
| 4XL | 114cm – 119cm (45″ – 46.9″) | 104cm – 109cm (41.1″ – 43″) |
| 5XL | 119cm – 124cm (47″ – 48.9″) | 109cm – 114cm (43.1″ – 45″) |
| 6XL | 124cm – 129cm (49″ – 50.9″) | 115cm – 119cm (45.1″ – 47″) |
| 7XL | 130cm – 133cm (51″ – 52.5″) | 120cm – 124cm (47.1″ – 49″) |
Binder Lights
source: https://spectrumoutfitters.co.uk/pages/light-binder-size-guide
| Size | Chest | Rib |
| XXS | 78.7cm – 83.6cm (31″ – 32.9″) | 69.8cm – 73.7cm (27.5″ – 29″) |
| XS | 83.8cm – 88.6cm (33″ – 34.9″) | 73.9cm – 78.7cm (29.1″ – 31″) |
| S | 88.9cm – 93.7cm (35″ – 36.9″) | 79cm – 83.8cm (31.1″ – 33″) |
| M | 94cm – 98.8cm (37″ – 38.9″) | 84.1cm – 88.9cm (33.1″ – 35″) |
| L | 99.1cm – 104cm (39″ – 40.9″) | 89.2cm – 94cm (35.1″ – 37″) |
| XL | 104cm – 109cm (41″ – 42.9″) | 94.2cm – 99.1cm (37.1″ – 39″) |
| XXL | 109cm – 114cm (43″ – 44.9″) | 99.3cm – 104cm (39.1″ – 41″) |
| 3XL | 114cm – 119cm (45″ – 46.9″) | 104cm – 109cm (41.1″ – 43″) |
| 4XL | 119cm – 124cm (47″ – 48.9″) | 109cm – 114cm (43.1″ – 45″) |
| 5XL | 124cm – 129cm (49″ – 50.9″) | 115cm – 119cm (45.1″ – 47″) |
| 6XL | 130cm – 134cm (51″ – 52.9″) | 120cm – 124cm (47.1″ – 49″) |
| 7XL | 135cm – 138cm (53″ – 54.5″) | 125cm – 130cm (49.1″ – 51″) |
GC2B Size Guide
All GC2B Binders
source: https://gc2b.co/pages/sizing
| Size | Chest | Shoulder Width |
| XS | <81cm (<32″) | <33cm (<13″) |
| S | 81cm – 87cm (32″- 34″) | 33cm – 40cm (13″ – 16″) |
| M | 87cm – 92cm (34″ – 36″) | 36cm – 43cm (14″ – 17″) |
| L | 92cm – 97cm (36″ – 38″) | 40cm – 50cm (16″ – 20″) |
| XL | 97cm – 102cm (38″ – 40″) | 50cm – 58cm (20″ – 23″) |
| XXL | 102cm – 107cm (40″ – 42″) | 50cm + (20″ +) |
| 3XL | 107cm – 112cm (42″ – 44″) | 50cm + (20″ +) |
| 4XL | 112cm – 119cm (44″ – 47″) | 50cm + (20″ +) |
| 5XL | 119cm – 127cm (47″ – 52″) | 50cm + (20″ +) |