Each stage of proofreading my book before it’s sent to the printer results in more precise editing than the last stage.
There are a couple of places in the book that list dimensions of artwork. As I’ve said here many times, fine art is listed as HxWxD in inches or centimeters. I had always written dimensions as follows:
12 x 9”
12 x 9 inches
While the bottom version is fine, the top is not–according to the Chicago Manual of Style (15th edition, my style book preference). According to CMS, this is proper:
12 x 9 “ (with a space after the last number if there is a space before and following the x)
12”x9” (with no spaces, but the inch sign repeated)
This last one is the version I opted for in the book since I felt the space looked funny after the number. However, in the newsletter I use “12 x 9 inches.”
Of course, another style book might have different rules.