Tommy John Underwear Size Chart
Tommy John runs true to size.
Runs SmallTrue to SizeRuns Large
Tommy John Men's Underwear Size Chart
Enter your waist or hip measurement to see your size highlighted here.
| Size | US | EU | UK | Waist (cm) | Hips (cm) |
|---|---|---|---|---|---|
| S | S (28-30) | 3 | S | 71-76 | 86-91 |
| M | M (31-34) | 4 | M | 79-86 | 94-102 |
| L | L (35-38) | 5 | L | 89-97 | 104-112 |
| XL | XL (39-42) | 6 | XL | 99-107 | 114-122 |
| XXL | XXL (43-46) | 7 | XXL | 109-117 | 124-132 |
Tommy John Women's Underwear Size Chart
Enter your waist or hip measurement to see your size highlighted here.
| Size | US | EU | UK | Waist (cm) | Hips (cm) |
|---|---|---|---|---|---|
| XS | XS (0-2) | 34 | 6 | 58-63 | 84-89 |
| S | S (4-6) | 36 | 8-10 | 64-69 | 89-94 |
| M | M (8-10) | 38-40 | 12-14 | 69-76 | 94-102 |
| L | L (12-14) | 42-44 | 16-18 | 76-84 | 102-109 |
| XL | XL (16-18) | 46-48 | 20-22 | 84-94 | 109-117 |
| XXL | XXL (20-22) | 50-52 | 24-26 | 94-102 | 117-124 |
Data verified May 2026 · Official size guide · See an error? Report it
Tommy John Sizing & Fit Guide
Tommy John underwear fits true to size with a performance fit that stays put. Their Second Skin fabric is stretchy and form-fitting. The Cool Cotton line is more relaxed. Size based on your waist measurement.
Related Underwear Size Charts
Frequently Asked Questions
Tommy John underwear fits true to size with a performance fit that stays put. Their Second Skin fabric is stretchy and form-fitting. The Cool Cotton line is more relaxed. Size based on your waist measurement.
Measure your waist at the narrowest point (usually just above the belly button) and your hips at the widest point. Then use our size chart table above to find your Tommy John size.
If you're between sizes in Tommy John underwear, we recommend sizing up for a more comfortable fit. Underwear that's too tight can be uncomfortable throughout the day, while slightly loose underwear is usually fine.