Trek Size Guide
Trek is a leading cycling brand specialising in performance-engineered bikes and cycling apparel. Trek's clothing is designed for cyclists of all disciplines, from road racing to mountain biking, with a philosophy centred on comfort, performance and style. All Trek garments are cut to follow true sizing based on an athletic build, with fit profiles ranging from pro-level aerodynamic cuts to relaxed MTB silhouettes. Whether you're measuring for jerseys, shorts or complete kits, accurate body measurements are essential to finding your ideal fit.
How to Measure
Use a cloth measuring tape and take all measurements while standing upright with feet shoulder-width apart. For maximum accuracy, measure next to your skin.
- Chest / Bust: Measure around the fullest part of your chest under your armpits with your arms relaxed at your sides. Keep the measuring tape parallel to the ground.
- Waist: Measure around your natural waist, which falls at the natural curve of your body (the indentation between your hips and rib cage). The tape should be close to your body but not snug.
- Hips: Wrap the measuring tape around the fullest part of your hips and buttocks, keeping it parallel to the ground.
Men's Cycling Clothing Size Chart
Trek men's sizes follow true sizing and are based on an athletic build. Measurements reflect actual body circumference, not garment measurements.
| Size | Chest (inches) | Chest (cm) | Waist (inches) | Waist (cm) | Hips (inches) | Hips (cm) |
|---|---|---|---|---|---|---|
| XS | 33–35 | 84–89 | 27–29 | 68–74 | 33–35 | 84–89 |
| S | 35–37 | 89–94 | 29–31 | 74–79 | 35–37 | 89–94 |
| M | 38–40 | 96–102 | 32–34 | 81–86 | 38–40 | 96–102 |
| L | 41–43 | 104–109 | 35–37 | 89–94 | 41–43 | 104–109 |
| XL | 44–46 | 112–117 | 38–41 | 97–104 | 44–46 | 112–117 |
| 2XL | 47–49 | 119–124 | 42–45 | 106–114 | 47–49 | 119–124 |
| 3XL | 50–52 | 127–132 | 45–48 | 114–122 | 50–52 | 127–132 |
Women's Cycling Clothing Size Chart
Trek women's sizes follow true sizing and are engineered for an athletic build with a contoured fit. Measurements reflect actual body circumference, not garment measurements.
| Size | UK Size | Bust (inches) | Bust (cm) | Waist (inches) | Waist (cm) | Hips (inches) | Hips (cm) |
|---|---|---|---|---|---|---|---|
| XS | 2–4 | 32–33 | 81–84 | 24–26 | 61–66 | 33–35 | 84–89 |
| S | 4–6 | 33–34 | 84–86 | 26–28 | 66–71 | 35–37 | 89–94 |
| M | 6–8 | 34–36 | 86–91 | 28–30 | 71–76 | 37–39 | 94–99 |
| L | 10–12 | 36–38 | 91–97 | 30–32 | 76–81 | 39–41 | 99–104 |
| XL | 12–14 | 38–40 | 97–102 | 32–34 | 81–86 | 41–43 | 104–109 |
| 2XL | 16–18 | 41–44 | 104–112 | 35–38 | 89–97 | 44–47 | 112–119 |
| 3XL | 18–20 | 44–47 | 112–119 | 38–41 | 97–104 | 47–50 | 119–127 |
| 4XL | 22–24 | 48–51 | 122–129 | 42–45 | 107–114 | 51–54 | 130–137 |
Product-Specific Guidance
Road Cycling Jerseys
Trek road jerseys are available in multiple fit profiles. Pro Fit offers a second-skin aerodynamic cut designed for racing peloton performance. Fitted provides a streamlined body fit optimised for enhanced performance. Check the item's fit profile before ordering, as silhouettes vary across the range.
Mountain Bike Jerseys & Shorts
MTB apparel uses a Semi-Fitted to Loose Fit approach, allowing freedom of non-restrictive movement whilst maintaining casual style. These garments are designed for comfort on technical terrain and longer rides, with room for layering underneath.
Gravel & All-Purpose Cycling Kits
Trek's gravel and all-condition kits typically feature a Semi-Fitted cut, balancing performance with comfort for long days in the saddle. Refer to individual product descriptions to confirm fit classification.
Sizing Between Categories
Trek garments follow true sizing across all categories. Always reference the size chart for your chosen item's specific fit profile, as a road Pro Fit jersey in size M will feel tighter than an MTB semi-fitted jersey in the same size.
Sizing Tips
- Always measure your body, not an existing garment. Body measurements are the most reliable indicator of Trek sizing.
- If your measurements fall between two sizes, consult the fit profile: choose the smaller size for a more aerodynamic, performance-oriented fit, or the larger size for comfort and room to layer.
- Trek road jerseys are designed to be worn close to the body for aerodynamic efficiency. If you prefer a looser fit, consider sizing up or choosing an MTB or gravel-specific garment.
- For accurate results, have someone else help you measure, or use a mirror to ensure the tape remains parallel to the ground when measuring chest, waist and hips.
- Trek clothing fits based on an athletic build; if you do not have an athletic physique, you may find sizing runs tight. In this case, size up by one size and consider tailoring if necessary.
- Women's sizes in Trek's range are engineered with contoured shaping; do not assume unisex sizing applies. Always cross-check women's measurements against the women's chart.
- Check the item's fit profile description on the product page before purchasing; fit varies considerably across road, MTB and gravel categories.