Hamilton and Hare is a London-based brand that is committed to giving men's underwear — a shamefully overlooked corner of the men's clothing market — the respect it finally deserves. The label, which was founded in 2012 by Olivia Francis, has become renowned for its focus on perfect fit and premium fabrics over extraneous aesthetics. This is men's underwear at its very best: soft, comfortable and fuss-free. And it's not just underwear that Hamilton and Hare has mastered. The brand extends its expertise to its premium range of loungewear, leisurewear and sportswear, always prioritising comfort, functionality and understated style. Sound good? Before you start filling your basket, you'll need to find your perfect fit. Read on for our ultimate guide to Hamilton and Hare sizing.

In contrast with many traditional men's underwear manufacturers, Hamilton and Hare takes an innovative approach to fit. For example, its boxer shorts offer a modern, slimline silhouette, achieved by working with a Savile Row tailor, while its trunks harness sportswear technology for a seamless body-moulding fit. Forget the traditional baggy, ill-fitting styles that lose shape after a few wears — Hamilton and Hare is forward-thinking in its approach, making underwear that, if cared for properly, will maintain a perfect fit for years to come.

All Hamilton and Hare garments are designed to fit true to size. The brand recommends that if you are between sizes, you go up to the nearest size. As its pieces are made using natural fibres like cotton, bamboo and lyocell, there is some minor natural shrinkage that occurs during washing.

Hamilton and Hare Sizing Charts

Boxer Shorts

Waist Size FR/IT
XXS 28" 38
XS 30" 40
S 32" 42
M 34" 44
L 36" 46
XL 38" 48

Boxer Briefs and Trunks

Waist Size FR/IT
S 30" 38" - 40"
M 32" - 34" 42" - 44"
L 36 46" - 48"
XL 38" - 40" 48" - 50"

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Shop all Hamilton and Hare at OPUMO.