These nickel finish domes with rivet backs are quite large, at a little bit under 5/8ths of an inch wide. The 15mm variety are good choice when you want to get noticed, and quietly say "hey, look at me, I am submissive!". Adorn a set of cuffs or your new harness with these, and you'll be sure to get dragged off somewhere nice.

If you are unsure of the quantity of studs that will fit your strap, you may either inquire first, or order more than you think you need. I can refund an overage, but not charge more for extra (unless you make a new order, which is more complicated for both of us).