Matsya Purana 58.10

58.10

gartāścatasraḥ śastāḥ syu striparvocchritamekhalāḥ.
sarvatastusavarṇāḥ syuḥ patākādhvajasaṃyutāḥ.. 58.9 ..

The gartas or pits should be seven in number, and the circles should be three inches (parvas *i.e.* digits) in height. Flags and buntings of the same colour should be on all sides.—9.