These nickel finish domes with rivet backs are wider than the rivets used on buckles and D-rings, plus taller and you know, dome shaped. The 12mm variety are good choice when you want to get noticed, and you want folk to sense your softer side. These are just under a half inch across.

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).