Sports Boxer Brief
Your everyday boxer brief, built with an athlete’s standards. The double-layered flyless pouch gives real support, the 1.5" waistband won’t roll, and soft, moisture-wicking fabric keeps you dry. Wear it on its own, or as a base layer under the Quad Strap Jock or 3 in 1 Hockey Garter Belt. It has no cup pocket and isn’t made to be worn with a cup.
Double-layered flyless pouch for all-day support
Soft, moisture-wicking fabric with 4-way stretch
Works as a base layer under the Quad Strap Jock or Hockey Garter
Not for use with an athletic cup. The Sports Brief has no cup pocket. It’s made for groin support when your sport or workout doesn’t require a cup. Need a jock? Shop our Jock Systems.
Free U.S. shipping on orders over $175. Ground, 2-Day and Overnight options at checkout.
30-day returns and free exchanges. Add Checkout+ at checkout for free returns and package protection.
Lifetime warranty on the athletic cup.
Sports Brief size guide
Measure around your natural waist, just above the hips. Don’t go by pant size.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 130–155 lb |
| Medium | 31–33" | 155–185 lb |
| Large | 34–36" | 185–215 lb |
| X Large | 37–40" | 215–250 lb |
| 2XL | 41–44" | 250–290 lb |
Designed for a supportive athletic compression fit. Between sizes? Size down for more compression and support, or size up for a more relaxed everyday fit. Full size chart
What’s included
One Sports Boxer Brief. 2pk and 3pk give you two or three pairs in the same size. No cup pocket. Not designed to be worn with an athletic cup.
Shipping & returns
Orders are processed and shipped within 1–3 business days. We don’t ship on weekends or major U.S. holidays, so a Friday order usually ships the following Tuesday. Delivery time starts once your order ships. See our full shipping policy →
- Shipping is calculated at checkout, with Ground, 2-Day and Overnight options.
- Free shipping on U.S. orders over $175.
- Returns are accepted within 30 days of delivery, even on worn or used gear.
- Exchanges are free on every order.
- Add Checkout+ at checkout for free returns and package protection.
- Refunds go to your original payment method or store credit, your choice. Allow 5–7 business days once we receive the return.
- Shipping fees aren’t refundable once an order ships.
Size chart & fit guide
Diamond MMA Size Chart
Size every Diamond MMA jock, short and brief by your waist, measured just above the hips. Not your pant size. Athletic cups come in Youth and Adult, and most athletes move to the adult cup around ages 14 to 15.
Start here
How do I measure for a jock or compression short?
It takes about a minute with a soft tape measure.
Find your natural waist
It's just above your hip bones, usually a little above your belly button.
Measure around
Wrap the tape around your body, level and snug, but not tight. Don't go by your pant size.
Match the chart
Find your waist in the chart for your product. Weight ranges are there to help if you're on the line.
Athletic cups
What size athletic cup do I need?
Our athletic cup comes in two sizes. Both use the same polycarbonate shell and soft rubber elastomer rim. Pick the one that covers fully without pinching at the edges.
| Cup | Length | Width | Depth |
|---|---|---|---|
| Youth | 5.5" | 3" | 2" |
| Adult | 6.75" | 4" | 2.25" |
When to move up: most athletes move from the youth cup to the adult cup around ages 14 to 15, depending on body type. If the youth cup no longer covers everything, it's time.
Adult
Quad Strap Jock & Compression Jock Short size chart
Built for a snug, supportive fit. Adult sizes have a drawstring waistband.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 120–150 lb |
| Medium | 30–32" | 140–170 lb |
| Large | 32–34" | 160–190 lb |
| X Large | 34–36" | 180–220 lb |
| 2XL | 36–40" | 210–260 lb |
| 3XL | 41–44" | 250–300 lb |
Fits: Quad Strap Jock System · Quad Strap Jock · Compression Jock Short System · Compression Jock Shorts
Youth
Youth jock & compression short size chart
Youth sizes don't have a drawstring, so measure carefully. Outgrown Youth X Large? Move to adult Small.
| Size | Age (approx.) | Waist |
|---|---|---|
| Youth Medium | 8–10 | 22–24" |
| Youth Large | 10–12 | 24–26" |
| Youth X Large | 12–14 | 26–29" |
Fits: Youth Quad Strap Jock System · Youth Compression Jock & Athletic Cup System · Youth Compression Jock Short System | White
Hockey
Hockey jock short, garter & jock pant size chart
Our hockey line runs Small to 2XL. Between sizes, or thicker in the thighs or seat? Go up a size.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 120–150 lb |
| Medium | 30–32" | 140–170 lb |
| Large | 32–34" | 160–190 lb |
| X Large | 34–36" | 180–220 lb |
| 2XL | 36–40" | 210–260 lb |
Fits: 3 in 1 Hockey Garter Belt · Hockey Jock Short System · Hockey Jock Short · Cut-Resistant Hockey Jock Short System · Cut-Resistant Hockey Jock Pant System
Performance Short
Performance Short size chart
The Performance Short runs on its own chart, Small to X Large, for both the built-in jock and built-in brief versions. The waistband has a drawstring.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 140–170 lb |
| Medium | 31–33" | 170–200 lb |
| Large | 34–36" | 200–230 lb |
| X Large | 37–40" | 230–270 lb |
Fits: Performance Short With Built-In Jock System · Performance Short With Built-In Jock · Performance Short With Built In Brief
Briefs
Compression Brief & Sports Boxer Brief size chart
Both briefs share one chart. They're made for support on days you don't need a cup. Size down for more compression, or size up for a more relaxed everyday fit.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 130–155 lb |
| Medium | 31–33" | 155–185 lb |
| Large | 34–36" | 185–215 lb |
| X Large | 37–40" | 215–250 lb |
| 2XL | 41–44" | 250–290 lb |
Fits: Compression Brief · Sports Boxer Brief
Fit tips
Between sizes?
Bigger thighs or glutes
Size up. The quad straps and leg openings will sit more comfortably.
Leaner build
Take the smaller size for a closer fit that holds the cup tighter.
Wrong size?
Exchanges are free on every order. Start one in the returns portal.
Apparel
Rash guard & T-shirt size charts
Questions
Sizing questions
How should an athletic cup fit?
It should cover everything, sit flat against your body and stay put when you run or squat. If it gaps at the edges or pinches, try the other size.
Should I go by my pant size?
No. Measure around your natural waist, just above the hips. Pant sizes vary by brand and usually sit lower on the body.
When should a youth athlete move to the adult cup?
Most athletes move from the youth cup to the adult cup around ages 14 to 15, depending on body type. If the youth cup no longer covers everything, it's time to size up.
Can I get a youth cup with an adult jock?
Yes. Our adult Systems let you choose the adult or youth cup, which works well for teens and smaller-framed athletes.
What if I'm between sizes?
Athletes with bigger thighs or glutes usually size up. Leaner builds may like the smaller size for a closer fit. Exchanges are free if you need to swap.
What if it doesn't fit?
Exchanges are free on every order. You can also return it within 30 days of delivery. Start through our returns portal.
Still not sure?
Answer a few questions and we'll match you to the right jock, cup and size for your sport. Or email info@diamondmma.com and our team will help.
Product details
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Description
The double-layered, flyless pouch gives you structured support without squeezing, and there’s no fly opening to gap or rub. Flat seams and a tagless design keep irritation down, even on long days.
The 1.5" waistband sits flat at your waist and won’t fold, roll or dig in. A 5" inseam hits mid-thigh, so the legs stay put instead of riding up under shorts, jeans or training gear.
Made for every day, and built to layer. Wear it under the Diamond MMA Quad Strap Jock or 3 in 1 Hockey Garter Belt for a smooth, comfortable base under your protection.
Groin support without a cup. The Sport Boxer Brief has no cup pocket and isn’t designed to be worn with an athletic cup.
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Materials & care
Fabric: 94% polyester, 6% spandex birdseye mesh jersey
Pouch: Double-layered, flyless
Waistband: 1.5" no-roll logo elastic
Seams: Flat seams, tagless
Inseam: 5", hits mid-thigh
Care: Machine wash cold -
Warranty
The Sports Boxer Brief has a 30-day warranty (60 days when you register your warranty), like every Diamond MMA product other than the athletic cup.
Problem with your gear? Fill out the Warranty Claim Form.
Can you wear a boxer brief under a jock?
Yes, and the Sports Boxer Brief is built for it. It’s the everyday boxer brief you’ll want on all day, with a double-layered flyless pouch, a 1.5" no-roll waistband and a 5" inseam that stays put. When it’s time to train or play, wear it as a base layer under the Diamond MMA Quad Strap Jock or 3 in 1 Hockey Garter Belt. The jock holds your cup in place, and the boxer brief keeps everything underneath smooth and comfortable.
Built for training and everyday wear
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Support that stays put
A double-layered flyless pouch gives structured support with no fly opening to gap or rub. The 1.5" logo waistband stays flat through every rep, run and long day.
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Soft, breathable, built to layer
Lightweight birdseye mesh with 4-way stretch wicks sweat and dries fast, and the 5" inseam keeps the legs from riding up. Wear it on its own, or under the Quad Strap Jock or Hockey Garter as your base layer.
Frequently asked questions
Can I wear an athletic cup with it?
No. The Sport Boxer Brief has no cup pocket and isn’t designed to be worn with a cup. It’s a supportive brief for training and sports that don’t require a cup. If you need a cup, choose one of our jock and cup systems, like the Compression Jock Short System or Quad Strap Jock System.
Which brief should I get?
None of our briefs have a cup pocket, and none are made to be worn with a cup. They’re supportive briefs for when you need groin support but not a cup. The difference is what’s built around the brief.
Sports Boxer Brief: Your everyday boxer brief, with a double-layered flyless pouch and a 5" inseam. Wear it on its own, or as a base layer under the Quad Strap Jock or 3 in 1 Hockey Garter Belt.
Compression Boxer Brief: A compression short with a brief built inside. The inner brief gives you support, and the outer compression short keeps everything from bunching under your gear.
Performance Short With Built-In Brief: Our Performance Short with the same built-in brief inside. Wear it as your outer short. It ends just above the knee.
What makes the pouch different?
It’s a double-layered, flyless pouch. The extra layer gives structured support without squeezing, and there’s no fly opening to gap, rub or bunch.
Will the waistband roll down?
No. The 1.5" logo waistband is built to stay flat, so it won’t fold, roll or dig in when you move.
How long is the leg?
The Sports Boxer Brief has a 5" inseam that hits mid-thigh. It’s long enough to stop riding up and short enough to wear under shorts, jeans or training gear.
Can I wear it under a jock?
Yes. The Sports Boxer Brief is made to be worn every day, and it works as a base layer under the Diamond MMA Quad Strap Jock or the 3 in 1 Hockey Garter Belt. It doesn’t have a cup pocket, so wear it with one of those when you need a cup.
What do the 2pk and 3pk include?
Two or three Sports Boxer Briefs in the size you choose.
How much is shipping?
Shipping is calculated at checkout, with Ground, 2-Day and Overnight options. U.S. orders over $175 ship free.
What if it doesn’t fit?
Exchanges are free, so you can swap for the right size. You can also return it within 30 days of delivery, even if you’ve worn it. Add Checkout+ at checkout for free returns and package protection.
What does the warranty cover?
The Sports Boxer Brief has a 30-day warranty, or 60 days when you register your warranty. Submit a claim through the returns portal. Fill out the Warranty Claim Form if you have a problem.
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