The numbers are 5, 4, and 3. I made the set screws black to make them less noticeable. Please refer to the images to make your judgment. The dice size is approximately 15mm in both length and width, and the side hole for the set screw is in the middle, so it's about 7.5mm. The hole diameter is 6mm, so please check the diameter of the knobs on your stringed instrument before purchasing. These are handmade, so please understand that there may be some misalignment of holes, scratches, and imperfections. They cannot be attached to vintage Gretsch guitars. The holes are drilled for current models. A hex wrench is required. Search terms: Beatles George Harrison John Lennon Rockabilly Gibson Fender Vintage Gretsch Wood bass Gretsch 6120 GRETSCH Rockabilly Stray Cats Brian Setzer Dice Dice Dice knob Dice knob