The smallest, 9 m

Kendo shiai-joDrawn as: a kendo shiai-jo: a wooden floor of 9 by 9 metres with white boundary lines, the cross at the centre and the two kaishi-sen, and 1.5 metres kept clear outside it.

The picture above was drawn when the docs were built. The script below draws it again with the published package.

import { drawKyogijo } from "@johnmorrisdotca/kyogijo-stadiums";

const svg = drawKyogijo({ sport: "kendo", budo: { size: 9 } });

This page imports the package from jsDelivr (major version 0), which serves only versions that have been published to npm. A feature added after the last release is not in it: the page then keeps the picture above and says why. The docs were built from version 0.6.1.