Official sizing guide for 2026
Giant pioneered compact geometry in road bikes and uses their Total Fit system to match riders to frames. As the world's largest bicycle manufacturer, they offer extensive size ranges and develop women's-specific geometry through their Liv brand.
| Size | Height Range | Inseam Range |
|---|---|---|
| XS | 5'1" - 5'5"(155 - 165 cm) | 27.6" - 29.5"(70 - 75 cm) |
| S | 5'4" - 5'8"(163 - 173 cm) | 29.1" - 31.1"(74 - 79 cm) |
| M | 5'7" - 5'11"(171 - 180 cm) | 30.7" - 32.7"(78 - 83 cm) |
| M/L | 5'10" - 6'1"(178 - 186 cm) | 32.3" - 34.3"(82 - 87 cm) |
| L | 6'0" - 6'4"(184 - 192 cm) | 33.9" - 35.8"(86 - 91 cm) |
| XL | 6'3" - 6'7"(190 - 200 cm) | 35.4" - 37.8"(90 - 96 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
| XS | 4'11" - 5'3"(150 - 160 cm) | 26.0" - 28.3"(66 - 72 cm) |
| S | 5'2" - 5'7"(158 - 170 cm) | 27.6" - 30.3"(70 - 77 cm) |
| M | 5'6" - 5'10"(168 - 178 cm) | 29.9" - 32.3"(76 - 82 cm) |
| L | 5'9" - 6'2"(176 - 188 cm) | 31.9" - 34.3"(81 - 87 cm) |
| XL | 6'1" - 6'6"(186 - 198 cm) | 33.9" - 36.6"(86 - 93 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
| XS | 4'11" - 5'3"(150 - 160 cm) | 26.0" - 28.3"(66 - 72 cm) |
| S | 5'2" - 5'6"(158 - 168 cm) | 27.6" - 29.9"(70 - 76 cm) |
| M | 5'5" - 5'9"(166 - 176 cm) | 29.5" - 31.9"(75 - 81 cm) |
| L | 5'9" - 6'1"(174 - 186 cm) | 31.5" - 33.9"(80 - 86 cm) |
| XL | 6'0" - 6'6"(184 - 198 cm) | 33.5" - 36.6"(85 - 93 cm) |
| Size | Height Range | Inseam Range |
|---|---|---|
| XS | 5'1" - 5'5"(155 - 165 cm) | 27.6" - 29.5"(70 - 75 cm) |
| S | 5'4" - 5'8"(163 - 173 cm) | 29.1" - 31.1"(74 - 79 cm) |
| M | 5'7" - 5'11"(171 - 180 cm) | 30.7" - 32.7"(78 - 83 cm) |
| M/L | 5'10" - 6'1"(178 - 186 cm) | 32.3" - 34.3"(82 - 87 cm) |
| L | 6'0" - 6'5"(184 - 196 cm) | 33.9" - 36.2"(86 - 92 cm) |
Specific sizing recommendations for Giant's most popular bike models. Geometry measurements shown for reference size (typically M or 54cm).
Pure race bike with aggressive geometry. Compact frame design pioneered by Giant allows for optimal stiffness and lighter weight.
Endurance road bike with D-Fuse seatpost for comfort. More upright position suits long-distance riding.
Trail bike with 135mm rear travel. Maestro suspension system provides excellent traction; riders often size down for aggressive riding.
Versatile gravel bike with D-Fuse handlebar and seatpost. Geometry balances stability and agility for mixed terrain.
Use our free calculators to determine your ideal Giant frame size based on your measurements.
See why Giant is great for beginners
Commuters Sizing GuideSee why Giant is great for commuters
Long Torso Riders Sizing GuideSee why Giant is great for long torso riders
Senior Riders Sizing GuideSee why Giant is great for senior riders
Short Riders Sizing GuideSee why Giant is great for short riders
Tall Riders Sizing GuideSee why Giant is great for tall riders
Compare sizing across different bike manufacturers to find your perfect fit.