Measure once. Ride pain-free.

The cardboard home test

Prepare the base

Sit and press

Mark and measure

Place a piece of corrugated cardboard on a flat, hard bench or stair step.

Sit down with your feet slightly elevated to mimic your riding position, pressing firmly.

Stand up, locate the two deepest indentations, and measure center-to-center in millimeters.

Find your RealSeat size

Compare your millimeter measurement directly to our four anatomically scaled widths to select the perfect support structure.

Small Adult

Medium Adult

Large Adult

Extra Large

Optimized for sit-bone widths under 100mm. Ideal for narrow athletic builds and active commuter setups.

Optimized for sit-bone widths between 100mm and 120mm. Our most popular size for standard hybrid bikes.

Optimized for sit-bone widths between 121mm and 140mm. Engineered for upright recreational riding.

Optimized for sit-bone widths over 140mm. Maximum support surface for wide cruiser setups.

Ready for pain-free miles?

Select your anatomically scaled comfort seat and get our 45-day comfort guarantee.