Shiva Purana
एकहस्तं द्विहस्तं वा सितं वा रक्तमेव वा ॥ एकहस्तस्य पद्मस्य कर्णिकाष्टांगुला मता ॥ ७ ॥
The width of the mystic lotus diagram may be one hand or two hands. It may be white or red in colour. The pericarp of the lotus of a hand’s width shall be eight aṅgulas.
english translation
ekahastaM dvihastaM vA sitaM vA raktameva vA ॥ ekahastasya padmasya karNikASTAMgulA matA ॥ 7 ॥
hk transliteration by Sanscript