Manasara 57.14

57.14

pādāyāmaṃ ca rudrāṃśaṃ mustatāraṃ saptamātrakam
grīvatāraṃ śarāṃśaṃ syāttatsamaṃ bāhumūlake

the length of the foot is eleven parts, and the width of the heel seven units; / the width of the neck should be five parts, and equal to that at the armpit;