Manasara 45.10

45.10

saptaviṃśāṅgulāntaṃ ca vistāraṃ navadhā bhavet
parārthaṃ yajanārthaṃ cāsanāyāmaṃ pūrvavat

ending at twenty-seven digits, the width is of nine kinds; / for the sake of others and for worship, the seat's length should be as before.