Cycling Kit Size Converter
Jersey, bib shorts, and gloves — sized across US, UK, and EU. Italian fit notes for Castelli/Rapha/Assos.
Cycling brand fit notes
Race fit (very tight, aero-focused)
Castelli, Assos, Pinarello, Pissei, Q36.5 — designed snug for aero advantage. Size UP 1–2 from US apparel. If between sizes, go up.
Club fit (snug but comfortable)
Rapha (Pro Team is race fit; Core is club), Pearl Izumi Elite, Specialized SL. Size TRUE to your US apparel.
Relaxed / casual fit
Pearl Izumi Select, Sugoi, Bontrager Solstice, Endura Hummvee. Size DOWN 1 if you want a closer fit. Designed for comfort over watts.
Specifics — bib shorts
Pad density and bib strap design vary more than size. Always check inseam — most cycling shorts are 7–9 inches; women's bibs often have shorter rear-rise.
FAQ
What's "Italian fit" in cycling?
Italian-fit brands cut their kit closer to the body for aerodynamics — fabric stretches but feels noticeably tighter than standard apparel. Size up 1–2 from your usual.
Bib shorts vs regular cycling shorts?
Bibs have shoulder straps instead of a waistband. Far more comfortable on long rides (no waistband digging in). Universally preferred for rides over 1 hour. Yes you have to take the whole kit off for bathroom breaks — worth it.
Should I size down for race kit?
No. Race kit is ALREADY cut tight. Sizing down causes restriction in pedaling motion + circulation issues. Buy your actual size.
Why are some jerseys way more expensive?
Top-tier kit uses high-stretch Lycra, laser-cut hems, and engineered moisture-wicking panels. Worth it if you ride 3+ times/week. For casual riders, mid-tier (Pearl Izumi, Castelli Endurance) is plenty.