I bought 10 collar stays from an auction website that sold them for less than the cost of 8 of these.  Well, that was a lesson in getting what you paid for.  The edges of them were sharp enough to cut my shirt collar plus they were scratched up.

These stays are beautifully polished with rounded edges.  You can only wear one shirt at a time so no need for more than 2 pairs of each size.

I was tempted to get the titanium,  but I like the value of the stainless.