As word
1kai1
book format, similar to in-4°, in-8° etc (a 16-kai format 16開|16开 [shi2 liu4 - kai1] is roughly A4) (abbr. to 開|开 [kai1]) 2ben3
book format, similar to in-4°, in-8° etc (a 16-kai format 16開|16开 [shi2 liu4 - kai1] is roughly A4) (abbr. to 開|开 [kai1])