Brand size guide
Giant size calculator
Choose your Giant model, add your height and inseam, and see which frame size suits you on that bike. Giant sizing is set model by model, so the check runs on the geometry of the model you pick.
Find your Giant size
Frame sizes differ between models, so pick the bike you are considering.
Quick size check
What Giant Contend AR 1 size fits you?
Get an instant frame estimate, then continue into the full fit report to check cockpit reach, bar drop, and setup risks before you buy.
Your measurements have been calculated for this bike. Exact sizes, rankings, setup numbers and risk details are ready in the full report.
Calculating…
No account needed for this check. The full report keeps this bike preselected.
How Giant sizing works
TrainCraft covers 12 Giant models, and all of them use lettered sizes (S, M, L and so on). A letter is a label, not a measurement: the same letter sits on different stack and reach from one model to the next.
Stack and reach decide how a frame fits. Each model below lists them for every size, and the calculator reads your result against that geometry.
Giant models you can check
Open a model for its geometry and size chart, or select it in the calculator above.
road bike
gravel bike
Frequently asked questions
- What size Giant should I get?
- It depends on the model as much as on you. Giant frame sizes are set per model, and two riders of the same height can need different sizes depending on inseam and torso length. Pick your model in the calculator at the top of this page, enter your height and inseam, and the check shows which size fits you.
- How do I find my Giant frame size?
- Choose the Giant model you are looking at, then enter your height and inseam in the size check. It compares your measurements with that model's stack and reach for every size. The model pages below show the full geometry.
- Is a Giant size the same on every model?
- No. Size labels are set per model, and the same label can have different stack and reach on another model. Check the model you plan to buy, not the label alone.
- Which Giant models can I check?
- TrainCraft covers 12 Giant models: Giant Contend AR 1, Giant Defy Advanced Pro, Giant Propel Advanced Pro 1, Giant TCR Advanced SL, Giant Revolt 1, Giant Revolt Advanced Pro, Giant Revolt Advanced SL 0, Giant Revolt X Advanced Pro 1, Giant Anthem Advanced 29, Giant Anthem Advanced SL SE, Giant Fathom 29, Giant XTC Advanced 29 1.
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