Size Guide
View our sizing charts below. If you're in-between sizes, we recommend sizing up for comfort! If you need more specific sizing help, please email us at help@youunderwear.com.
Bralette / More supportive bra / Women's knickers / Men's trunks / Girls' bralettes / Girls' knickers / Loungewear
How to Measure Yourself
Chest band: wrap the tape measure around your body, just under your bust.
Bust: measure the fullest part of your bust.
Waist: measure around your body approximately 5cm below your natural waist where the waistband of trousers normally sit.
Lower hip: wrap the tape measure around the fullest part of your hips and bottom.
Two-Way Strap Bralette:
| Bralette Size | UK | Band Width (in) | Band Width (cm) | Fits Bra Sizes (Approx) |
| XS | 8-10 | 27" | 68.5 | 30 B/C/D - 32 A/B/C |
| S | 10-12 | 29.5" | 75 | 32 B/C/D - 34 A/B/C |
| M | 12-14 | 32" | 81 | 34 C/D - 36 A/B/C |
| L | 14-16 | 34.5" | 87.5 | 36 C/D - 38 A/B |
More Supportive Bra:
| Bra size | Chest band measurement (inches) | Approx. cup sizes | Approx. UK dress size |
| Small | 28-30" | B, C, D | 8- 10 |
| Small + | 28-30" | DD, E, F | 8- 10 |
| Medium | 32-34" | B, C, D | 12-14 |
| Medium + | 32-34" | DD, E, F | 12-14 |
| Large | 36-38" | B, C, D | 16-18 |
| Large + | 36-38" | DD, E, F | 16-18 |
| Extra large | 40-42" | B, C, D | 20-22 |
| Extra large + | 40-42" | DD, E, F | 20-22 |
Women's Thongs, Bikinis, and Boy Shorts:
| UK Sizes | EU Size | Waist (in) | Waist (cm) | Hips (in) | Hips (cm) |
| 6 | 34 | 23-24 | 58.5 - 61 | 33 | 84 |
| 8 | 36 | 25-26 | 63.5 - 66 | 35 | 89 |
| 10 | 38 | 27-28 | 68.5 - 71 | 37 | 94 |
| 12 | 40 | 29-30 | 73.5 - 76 | 39 | 99 |
| 14 | 42 | 31-32 | 78.5 - 81 | 41 | 104 |
| 16 | 44 | 33-34 | 83.5 - 86 | 43 | 109 |
| 18 | 46 | 35-36 | 88.5 - 91 | 45 | 114 |
| 20 | 48 | 37-38 | 93.5 - 96 | 47 | 119 |
| 22 | 50 | 39-40 | 99.5 - 101 | 49 | 124 |
Men's Trunks:
| Size | Waist (in) | Waist (cm) | Clothing Size (approx.) (in) | Clothing Size (approx.) (cm) |
| XS | 29-31" | 74-79 | 28-30" | 71-76 |
| S | 31-33" | 79-84 | 30-32" | 76-84 |
| M | 33-35" | 84-89 | 32-34" | 84-89 |
| L | 36-38" | 91-97 | 34-386" | 91-97 |
| XL | 39-41" | 99-104 | 36-38 | 91-97 |
| XXL | 41-43" | 104-109 | 38-40" | 97-109 |
| 3XL | 43-45" | 109-114 | 40-42" | 109-114 |
Girls' Bralettes:
We feel that there isn’t a set size for bodies at different ages, and we don’t want to put any additional pressure on young girls, so our sizing looks a little different. We have 4 sizes, all named after Ugandan towns! We suggest using band width as a starting point, although do get in touch if you have any specific sizing questions.| Size | Band Width (in) | Band Width (cm) | Fits Ages (Approx.) | Worn By: |
| Jinja | 23 | 57-58 | 9-10 |
Hollie & Amelia, age 9 1/2, band with 23" |
| Kira | 25 | 63-64 | 10-11 | Help us fill this in ... |
| Lira | 27 | 68-69 | 11-14 |
Liv, age 11. Phoebe & Flora, age 11 1/2. Lana, age 13 1/2, 69cm band width, wears 30B/XS. Beth, age 14. |
| Masaka | 29 | 73-74 | 13+ | Hannah, 32C |
Girls’ Knickers:
| Details | Waist (in) | Hips (in) | Ages (Approx.) | Women's equivalent size |
| Jinja | 22-23.5” | 25-27” | 7-9 |
4 (EU 32) |
| Kira | 24-25” | 30-32” | 9-11 |
6 (EU 34) |
| Lira | 25.5-27” | 34-35” | 11-13 |
8 (EU 36) |
| Masaka | 27.5-28.5” | 37.5-38.5” | 13+ |
10 (EU 38) |
Pyjama bottoms:
Our PJs are designed to be unisex, so the sizing is a bit more flexible with an elasticated waist, cord drawstring and also longer leg length.
| Details | Women's sizing (UK) | Men's sizing |
| XS | 6-8-10 | 28-30" waist |
| S | 10-12-14 | 30-32” waist |
| M | 14-16-18 | 34-36” waist |
| L | 18-20-22 | 38-40" waist |
