d100's are notorious for being difficult to read. with this print you'll be able to put your d100 inside, swirl it around, and read the number. the top of this print is designed with a hole on the top so that you can see what number comes out on top. the 2 halves crew into each other for a seamless fit. the sizing ring was designed for minimal waste so that way you can figure out what scale size you need for your d100. please print this slightly large than your d100 so that way it has room to roll around inside the casing but not so large that you can't read the number on top