Updated for 2026 — Road, Mountain, Hybrid, Gravel & Kids
Choosing the wrong frame size leads to discomfort, poor handling, and even injury. The tables below map your height to the recommended frame size for every major bike category so you can narrow your search in seconds.
Get an accurate reading
Pro tip: For a more precise fit, also measure your inseam and use our bike size calculator.
Road bike frames are measured in centimeters along the seat tube. These sizes follow industry-standard geometry used by brands like Trek, Specialized, Giant, and Canyon.
| Rider Height | Height (cm) | Frame Size | Label |
|---|---|---|---|
| 4'10"–5'1" | 147–155 | 47–49 cm | XXS |
| 5'1"–5'3" | 155–160 | 49–51 cm | XS |
| 5'3"–5'5" | 160–165 | 51–53 cm | S |
| 5'5"–5'7" | 165–170 | 53–54 cm | S/M |
| 5'7"–5'9" | 170–175 | 54–55 cm | M |
| 5'9"–5'11" | 175–180 | 55–57 cm | M/L |
| 5'11"–6'1" | 180–185 | 57–58 cm | L |
| 6'1"–6'3" | 185–190 | 58–60 cm | XL |
| 6'3"–6'5" | 190–196 | 60–62 cm | XXL |
Looking for brand-specific data? Browse size charts by brand or use our road bike size calculator.
Mountain bike frames are traditionally sized in inches and tend to run smaller than road bikes for extra standover clearance on technical terrain.
| Rider Height | Height (cm) | Frame Size | Label |
|---|---|---|---|
| 4'10"–5'2" | 147–157 | 13"–14" | XS |
| 5'2"–5'6" | 157–168 | 15"–16" | S |
| 5'6"–5'10" | 168–178 | 17"–18" | M |
| 5'10"–6'1" | 178–185 | 19"–20" | L |
| 6'1"–6'4" | 185–193 | 21"–22" | XL |
| 6'4"+ | 193+ | 23"+ | XXL |
Dial in your MTB fit with our mountain bike size calculator.
Hybrid and commuter bikes blend road and mountain geometry. Sizing is generally expressed in inches with an upright riding position in mind.
| Rider Height | Height (cm) | Frame Size | Label |
|---|---|---|---|
| 4'11"–5'3" | 150–160 | 14"–15" (S) | S |
| 5'3"–5'7" | 160–170 | 15"–16" (S/M) | S/M |
| 5'7"–5'11" | 170–180 | 17"–18" (M) | M |
| 5'11"–6'2" | 180–188 | 19"–20" (L) | L |
| 6'2"–6'5" | 188–196 | 21"–22" (XL) | XL |
Need a personalized recommendation? Try the general bike size calculator.
Gravel bikes share road-bike frame measurements (cm) but feature slacker geometry for stability on mixed terrain. Many riders size down slightly compared to their road bike for a more agile feel.
| Rider Height | Height (cm) | Frame Size | Label |
|---|---|---|---|
| 5'1"–5'4" | 155–163 | 49–51 cm | XS/S |
| 5'4"–5'7" | 163–170 | 51–54 cm | S/M |
| 5'7"–5'10" | 170–178 | 54–56 cm | M |
| 5'10"–6'0" | 178–183 | 56–58 cm | M/L |
| 6'0"–6'3" | 183–190 | 58–60 cm | L/XL |
| 6'3"+ | 190+ | 60–62 cm | XL/XXL |
Fine-tune your selection with our gravel bike size calculator.
Children's bikes are sized by wheel diameter rather than frame size. Height is the most reliable indicator—age ranges are approximate and vary from child to child.
| Child Height | Height (cm) | Wheel Size | Approx. Age |
|---|---|---|---|
| 2'10"–3'4" | 86–100 | 12" | 2–3 |
| 3'4"–3'9" | 100–115 | 14" | 3–5 |
| 3'9"–4'3" | 115–130 | 16" | 4–6 |
| 4'0"–4'5" | 122–135 | 18" | 5–7 |
| 4'3"–4'9" | 130–145 | 20" | 6–9 |
| 4'9"–5'3" | 145–160 | 24" | 8–12 |
| 5'0"–5'5" | 152–165 | 26" | 10–13 |
Use our kids bike size calculator for a personalized recommendation, or explore our age-specific kids guides.
Height is a starting point, not the answer
Two riders at 5'10" can need different frames if one has a longer torso and the other has longer legs. Pair your height with an inseam measurement for a reliable fit.
Standover clearance matters
You should clear the top tube by at least 1–2 inches on road bikes and 2–4 inches on mountain bikes when straddling the frame flat-footed.
Between sizes? Consider your goals
Size down for responsive handling and a racier position. Size up for a more relaxed, endurance-friendly posture. Component swaps (stem, seatpost) can fine-tune either choice.
Brand sizing is not universal
Always check the manufacturer's geometry chart. Reach and stack values are the most consistent way to compare frames across brands.
Our free calculators use your height and inseam to recommend the exact frame size for your body and riding style.
Frame geometry varies between manufacturers. Check our official brand size charts for the most accurate data.