TYR Mens Swimwear Size Guide

This size guide covers TYR men's adult swimwear, available in sizes 26–40 (US sizes XS through XXL). TYR designs performance swimwear engineered for competitive and fitness swimmers, with a focus on durability, fit, and performance in the water. All measurements are body measurements taken directly from your body, not garment measurements. TYR's sizing system uses its own numeric scale — always use your body measurements rather than your usual clothing size to find the correct fit.

TYR men's swimwear is sized using two key body measurements: Waist and Hip. Use the waist measurement as the primary guide when selecting your size. US size equivalents are shown in the sizing table as a secondary reference only — always prioritise body measurements.

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Body Measurement Points
TYR men's swimwear body measurement points — waist and hip diagram
How to Measure

Use a soft measuring tape and take all measurements directly against your skin. All measurements are body measurements, not garment measurements. Use your waist measurement as the primary guide when selecting your TYR size.

  • A
    HipMeasure around the fullest, widest part of the hips and seat, keeping the tape horizontal.
  • B
    WaistMeasure around the natural waist, keeping the tape level all the way around.

Note: If your waist and hip measurements fall across different size brackets, use your waist measurement as the primary guide. All measurements are body measurements, not garment measurements.

Sizing Table — TYR Men's Adult Swimwear (Sizes 26–40)
26 28 30 32 34 36 38 40
UK Size 26 28 30 32 34 36 38 40
US Size XS S S M M L XL XXL
Body Measurements
Waist inches 26–27.5 28–29.5 30–31.5 32–34 34.5–36 36.5–38.5 39–41 41.5–44
Hip inches 32–33 33.5–34.5 35–36.5 37–38.5 39–40.5 41–43 43.5–45.5 46–48

All measurements are body measurements, not garment measurements. Where measurements fall across size brackets, use your waist measurement to determine your size.

Fit Notes — TYR Men's Swimwear
  • Always use your waist measurement as the primary guide when selecting your TYR men's size.
  • TYR uses its own numeric sizing system (26–40) which does not correspond directly to standard UK or US clothing sizes — always use body measurements rather than your usual clothing size.
  • TYR swimwear is engineered for a close, performance fit — the suit will feel firm when first tried on. Do not size up based on initial tightness; the fabric eases slightly with wear.
  • The waistband should sit flat and secure against the body with no rolling or gaping. If the waistband rolls or the suit feels loose around the hips, try the next size down.
  • The suit should be completely wrinkle-free when correctly fitted. Any bunching or gathering around the hips or seat indicates the suit is too large.
  • The leg hems should feel snug but not restrictive — they should not dig in or restrict movement or blood flow during swimming.
  • If your waist and hip measurements suggest different sizes, use your waist measurement to determine your size. Speak to a member of staff at Allens if you are between sizes.
  • TYR swimsuits are constructed from high-durability chlorine-resistant fabrics designed to retain their shape and colour over extended training use.
  • Rinse in cold fresh water immediately after every use to remove chlorine, salt, and sunscreen. Do not machine wash, tumble dry, iron, or dry-clean.
  • Store flat and dry, away from direct sunlight, to preserve the fabric's elasticity and colour.
  • Unsure? Contact our team or call +44 1827 330600. Speak to a member of staff at Allens if you are unsure.
Frequently Asked Questions — TYR Men's Swimwear Sizing

Take two body measurements — waist and hip — using a soft tape measure against your skin. Use your waist measurement as the primary guide and compare to the sizing table above. TYR uses its own numeric sizing system (26–40) which does not correspond directly to standard UK or US clothing sizes, so always use body measurements rather than your usual size.

Training swim jammers are primarily sized by waist measurement. Use your waist as the first guide and check that your hip falls within or close to the same size range. If you are between sizes on waist, speak to a member of staff at Allens for advice.

Use your waist measurement as the primary guide. If your measurements fall across two size brackets, speak to a member of staff at Allens Swimwear for advice before purchasing.

TYR men's swimwear uses its own numeric sizing system (26–40) with approximate US size equivalents (XS through XXL). These do not map directly to UK clothing sizes. Always use your waist and hip body measurements to find the correct TYR size — do not assume your size based on a UK clothing label or other swimwear brands you may have purchased previously.

TYR produces both training and competition jammers for men. Their standard men's training jammers are designed for performance training and fitness swimming, with chlorine-resistant fabrics built for regular pool use. TYR also produces a range of competition racing jammers approved for sanctioned competitive events. Speak to a member of staff at Allens for guidance on the right TYR jammer for your level and purpose.

TYR sizes 28 and 30 both correspond to US S, and sizes 32 and 34 both correspond to US M. This reflects the fact that TYR's numeric sizing offers more granularity than standard US clothing sizes within the same general size range. Always use your body measurements — waist and hip — to determine whether size 28 or 30, or 32 or 34, is the better fit for you.

If you are between sizes, size to your waist measurement. TYR swimwear is engineered for a close, performance fit and the fabrics ease slightly with wear — if in doubt between two sizes, try the larger size and check that the waistband sits flat with no rolling or gaping. Speak to a member of staff at Allens if you are unsure.

TYR's original sizing chart lists all measurements in inches. Centimetre equivalents have been calculated and are available in the sizing table above — simply toggle between inches and cm using the button above the table. Both sets of values are body measurements taken directly from your body, not garment measurements.

Rinse your TYR jammer thoroughly in cold fresh water immediately after every use to remove chlorine, salt, and sunscreen. Hand wash gently with a mild detergent if needed. Do not machine wash, tumble dry, iron, or dry-clean. Store flat and dry, away from direct sunlight, to preserve the fabric's elasticity and colour over time.

TYR swimsuits are primarily designed for pool use. While the chlorine-resistant fabrics will tolerate occasional use in open water or the sea, prolonged exposure to salt water can accelerate fabric degradation. Always rinse the suit thoroughly in fresh water after every use. For dedicated open water or triathlon swimming, a purpose-built open water suit or wetsuit is recommended.