Are you talking about the flip style TT embroidered yardage book? If so, most flip style course yardage books will fit. The left to right book style yardage books doesn't work well with the flip style design.

Probably more of a scorecard holder than a yardage book cover.

Courses tend to have all different sizes and configurations of yardage books and scorecards. Some will fit much better in the holder than others, but I’ve found just about any one can be made to work in any holder.

I have found that I tend to have to cut the yardage book back page down a little to fit. No big deal though. I love mine!!

What you see the Tour players using differs from what most courses sell. Most of the players caddies have old books sized to fit the bib, and the players have smaller books as well. Between the card, pin sheet, and yardage book, it fits the men's back pocket much better than the women's. Little Lydia looks like she carrying a book.

I can tell you this, my buddy who's still caddying for a major winner has a ridiculous yardage book collection, with CRAZY detail, especially the Ryder/President's Cup courses. They do a lot of work on the course that goes unmentioned.