The Compendium of Bheḷa 4.4.16

4.4.16

sthūlakāyeṣu sattveṣu yavamātrapramāṇataḥ | hrasvakāyeṣu sattveṣu truṭimātrapramāṇataḥ ||

In large-bodied creatures it measures a barley corn; / in small-bodied creatures it measures a truṭi;