This set was created for my school library to give my kids a better view of what they will find in each Dewey category. The set includes 1 of each category that covers an overview of all. In addition, for all sections except 000, 100, 200, and 400, there are additional signs included at the natural break of topics within the hundred. There are a total of 42 8x10 (portrait) signs. These were created in with color backgrounds as I also use tape on the book spines to indicate which category they belong in. Since I'm a solo librarian, this saves time in shelving, helps me spot things that are in the wrong place, and empowers my kids to be able to find things for themselves. I also use a set of each whole 100 for a bulletin board display.