Biblical Length of Noah's Ark Was 300 __

This page is the CodyCross answer for the clue below from Architectural Styles, Group 1165, Puzzle 5 (Forbidden City).

Question is: Biblical Length of Noah's Ark Was 300 __

and the answer is: CUBITS

Word Meaning:

CUBITS — plural of cubit, an ancient unit of measurement

Definitions from Wiktionary.