From the Introduction:
This Counter Pack, focusing on Demons and Devils, contains more than 65 unique monster images, most with multiple counters available for use. These full-color counters are based on a one-inch equals five-foot scale. Therefore, creatures with a 5-ft. by 5-ft. Face statistic will occupy a single one-inch counter. Before beginning play, carefully cut apart the counters with an x-acto knife or scissors. Please be sure to take care with these tools.
There are eight pages of counters in total. These pages are divided into 4 categories: Demons from the Core d20 rules, Demons from Book of Fiends, Volume Two: Armies of the Abyss, Devils from the Core d20 rules, and Devils from Book of Fiends, Volume One: Legions of Hell. Each page lists the type, name, Challenge Rating, and the number of counters for each creature. For monsters that appear in quantity, we have often provided alternate images, to provide some variety and enhance the gaming experience.