Do PUMP! Underwear Run True to Size? The UK Fit & Sizing Guide
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Do PUMP! Underwear
Run True to Size?
Short answer: yes. PUMP! uses standard waist-based sizing — so in most cases you order the same size you'd take in any well-fitting brief or boxer. Here's how to get it right first time, from an official UK PUMP! stockist trading since 2006.
PUMP! runs S, M, L and XL, sized by your natural waist. The pouch is contoured for a supportive, lifted fit rather than a compressive one, so there's no need to size up for comfort. If you're between sizes or simply prefer more room around the waistband, take the larger size; for the signature sculpted PUMP! look, take your true size.
PUMP! Size Chart (UK)
Sizing is based on your natural waist measurement, not your jeans size. Measure around your waist just above the hip bone, keeping the tape level and snug.
| Size | Waist (inches) | Waist (cm) |
|---|---|---|
| S | 28 – 30" | 71 – 76 cm |
| M | 30.5 – 32" | 77 – 81 cm |
| L | 32.5 – 34" | 82 – 86 cm |
| XL | 34.5 – 36" | 87 – 91 cm |
Right on a boundary measurement (say, exactly 32")? Go down for a sculpted fit, up for a relaxed waistband. XL is currently the largest size in the PUMP! range.
How to Measure in 30 Seconds
- Grab a soft tape measure (or string and a ruler).
- Wrap it around your natural waistline, level with your hip bones — usually a little below the belly button.
- Keep it level all the way round and snug, but don't pull tight or hold your breath.
- Match the number to the chart above.
Measuring beats guessing from your jeans size — denim sizing is notoriously generous and varies brand to brand.
Does the Fit Change by Style?
Your size stays the same across the range — a brief, a boxer and a jockstrap are all true to your waist. What changes is the feel.
The most supportive cut, with the contoured pouch doing the heavy lifting. Order your normal size — the brief is the truest fit in the range.
A longer leg with the same pouch support. True to size — no need to size up for the cut. The leg sits flat and stays in place.
The waistband is the anchor, so go by your waist measurement as normal. The straps stretch to fit a wide range of seat and thigh shapes.
"Cut closer to the body by design — form-fitting, not small. Take your true waist size and let the stretch do the rest."
The PUMP! fit, in one line"I'm Between Sizes" — What Now?
Take the smaller size for the signature PUMP! lift and a body-hugging look — the four-way stretch means it won't feel restrictive. Take the larger size if all-day waistband comfort matters more to you than a sculpted silhouette. At a boundary measurement, most guys are happiest in the smaller of the two.
- The waistband should sit flat — no digging in, no rolling down.
- Give a new pair one wear to settle; the fabric relaxes slightly to your shape.
- Wash cool (30°C) and air dry to keep the elastane springy and the fit true.
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Official UK stockist since 2010. Free UK shipping, next-day available, 30-day returns.
New to the brand? Read our complete PUMP! underwear UK guide for styles, fabrics and the famous enhancing pouch.
