तदुभयमष्टाङ्गुलायामम् ॥ कZ_०२.११.८४ ॥
tadubhayamaṣṭāṅgulāyāmam
Both of those (two varieties just mentioned) are to have a length of eight aṅgulas.
To attach the standard unambiguously to a new pair of varieties and prevent cross-referencing errors in administrative use.