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REND®
Fit

Size & fit

Sizes XS–XXL across every cut. Measure your waist at the band line — not your trouser size, which is vanity-sized and differs by brand.

Body measurements

Find your size

SizeWaist (in)Waist (cm)Hip (in)Hip (cm)USEUUK
XS26–2866–7133–3584–8926–2844–4626–28
S28–3071–7635–3789–9428–3046–4828–30
M30–3276–8137–3994–9930–3248–5030–32
L32–3481–8639–4199–10432–3450–5232–34
XL34–3786–9441–44104–11234–3652–5434–36
XXL37–4094–10244–47112–11938–4056–5838–40

Between two sizes? Take the larger. Our waistband has 30 mm of stretch, not 60 — it is built to hold, not to give.

Leg length

Which cut

CutInseamSitsBest under
Boxer brief 7"7 in / 18 cmMid-thighJeans, chinos, suit trousers
Boxer brief 5"5 in / 13 cmUpper thighShorts, slim trousers
Trunk 3"3 in / 8 cmHigh thighShorts, linen, summer
Boy short2.5 in / 6 cmFull seat, mid riseLeggings, anything tight
Cheeky—Cut away at the seat, mid riseAnything high-waisted
High-waist brief—Full seat, natural waistDresses, high-rise trousers
Thong—Low riseUnder everything, no line

Leg length is measured from the crotch seam down the inside of the leg. A 3" trunk on a 6'2" frame reads shorter than on a 5'6" frame — that is normal, not a fault.

Drift boxer brief with a solid cobalt REND waistband
Two minutes

How to measure

01

Waist

Stand relaxed, tape around the narrowest part of your torso, roughly where the band sits. Keep one finger under the tape. Do not suck in.

02

Hip

Feet together, tape around the widest part of the seat. This is the number that decides whether the leg opening is right.

03

Thigh

Around the fullest part of the upper thigh, standing. Most people measure too low — go up until the tape stops growing.

04

Leg length

From the crotch seam down the inside of the leg to where you want the hem. Compare against 7", 5" and 3".

The material

Mercerized cotton.
Not pure cotton.

Every pair is cut from mercerized cotton — long-staple cotton yarn held under tension while it is treated with caustic soda, then washed out. That one step changes the fibre: the yarn swells, straightens and takes on a low, silk-like sheen, and it stops behaving like the cotton you know.

What you get for it: a softer hand on the first wear rather than the tenth, real resilience, and markedly better abrasion resistance at the seat and inner thigh — the two places a pair actually wears out. It also holds its dimensions, so a pair that fits on day one still fits on day ninety.

A pure-cotton brief is a different product. It is cheaper to make, it goes limp, and it pills. We do not sell one.

Mercerized cotton waistband and print detail
Fabric behaviour

Three weights of the same yarn

FabricStretchRecoveryFit advice
Mercerized 180Two-way, moderateVery goodTrue to size. The everyday weight — silky, light, holds its shape.
Mercerized 220Two-way, firmExcellentTrue to size. Denser and more opaque; the weight that holds a big print without distorting.
Mercerized CoolFour-way, highExcellentTrue to size. Fine-gauge, breathes and wicks — the one to take if you run hot.