Men's Size Guide
Find your perfect fit with our men's size guide. We carry multiple brands, so these charts use the most common waist, chest, weight and height measurements across our underwear and tops to help you shop briefs, trunks, tank tops, shirts and more with confidence.
Toggle between metric and imperial units. Sizing may vary slightly by style and brand.
Men's Underwear Size Chart
| Size | Waist (cm) | Weight (kg) | Height (cm) |
|---|---|---|---|
| M | 64–71 | 50–59 | 165–170 |
| L | 71–79 | 59–68 | 170–175 |
| XL | 79–84 | 68–75 | 175–180 |
| XXL | 84–89 | 75–84 | 180–185 |
| 3XL | 89–94 | 84–93 | 185–190 |
| 4XL | 94–99 | 93–102 | 190–195 |
| Size | Waist (in) | Weight (lb) | Height (ft/in) |
|---|---|---|---|
| M | 25–28 | 110–130 | 5'5"–5'7" |
| L | 28–31 | 130–150 | 5'7"–5'9" |
| XL | 31–33 | 150–165 | 5'9"–5'11" |
| XXL | 33–35 | 165–185 | 5'11"–6'1" |
| 3XL | 35–37 | 185–205 | 6'1"–6'3" |
| 4XL | 37–39 | 205–225 | 6'3"–6'5" |
Men's Top Size Chart
| Size | Chest (cm) | Weight (kg) | Height (cm) |
|---|---|---|---|
| S | 81–86 | 50–59 | 165–170 |
| M | 86–91 | 59–68 | 170–175 |
| L | 91–97 | 68–75 | 175–180 |
| XL | 97–102 | 75–84 | 180–185 |
| XXL | 102–107 | 84–91 | 185–190 |
| Size | Chest (in) | Weight (lb) | Height (ft/in) |
|---|---|---|---|
| S | 32–34 | 110–130 | 5'5"–5'7" |
| M | 34–36 | 130–150 | 5'7"–5'9" |
| L | 36–38 | 150–165 | 5'9"–5'11" |
| XL | 38–40 | 165–185 | 5'11"–6'1" |
| XXL | 40–42 | 185–200 | 6'1"–6'3" |
How to Measure
Waist
- Wrap a soft measuring tape around your natural waistline, just above your belly button.
- Keep the tape parallel to the floor and snug but not tight.
- Record the measurement and match it to the Waist column in the underwear chart.
Chest
- Stand naturally and wrap the tape around the fullest part of your chest, under your armpits.
- Keep the tape level across your back and relaxed, not pulled tight.
- Record the measurement and match it to the Chest column in the top chart.
Fit Tips by Style
Underwear
Briefs — Sit at the natural waist with a close, supportive fit. Follow the waist chart directly.
Boxer Briefs — Offer mid-thigh coverage with light compression. Choose your true waist size.
Trunks — Shorter legs than boxer briefs but the same waist fit. Use your regular waist size.
Thongs & G-Strings — Minimal coverage. If you are between sizes, size down for a secure pouch.
Boxer Shorts — Looser, more relaxed fit. If you are between sizes, size up for extra comfort.
Tops
Tank Tops — Usually fitted around the chest and shoulders. Choose the size that matches your chest measurement.
Shirts — Standard fit follows the chest chart. If you prefer a relaxed fit or layer underneath, size up.
Male Bodysuits — Close-fitting one-piece. If your chest and waist measurements fall in different sizes, choose the size that fits your chest and check the waist stretch.
Shop by Style
Browse all men's underwear and tops and filter by briefs, boxer briefs, trunks, tank tops, shirts and more.
Frequently Asked Questions
What size men's underwear should I buy?
Match your waist measurement to the Waist column in our underwear chart. If your measurement falls between two sizes, consider the style and your preferred fit. Use the unit toggle to view cm/kg or in/lb.
What size men's top should I buy?
Measure the fullest part of your chest and match it to the Chest column in our top chart. If you are between sizes, choose the larger size for a more comfortable fit.
What if my measurements fall between two sizes?
For a snug, supportive fit, choose the smaller size. For a looser, relaxed feel, choose the larger size. When your measurements are inconsistent, always choose the larger size.
Do underwear and top sizes use the same size letter?
Yes, both use S, M, L, XL, XXL, but the measurement columns are different: underwear is based on waist, while tops are based on chest. Always check the correct chart for the garment you are buying.
Do different styles fit differently?
Yes. Compression styles like briefs and trunks fit closer to the body, while boxer shorts are roomier. Tops such as tank tops and bodysuits are more fitted, while casual shirts may be cut looser.
Are these sizes the same for every brand on UndiesForMen?
Most brands we carry follow this waist and chest grading. Minor differences may exist between fabrics or cuts, so always check the style notes on the product page.