『계본 등록』은 2권 2책으로 구성되어 있으며, 크기는 가로 17.2㎝, 세로 24.5㎝이다.
"Report of Navy Commander-in-Chief Yi Unryong to King Seonjo" is composed of two volumes and two books, which the size is 17.2 cm in width and 24.5 cm in length.