Actually metric sizes. Shipped with no padding. Balls went everywhere and had to sorted individually.
I’ve never had a package shipped so poorly. I had to measure each ball with a micrometer to sort them, so if you don’t have one, don’t buy this. Also, the sizes are lies. These are actually metric balls. For instance, the 1/4” balls are .236 inches which is 5.99 mm.
On the plus side, they aren’t magnetic so they are probably stainless and I personally only bought they because I could find any set of metric sized balls anywhere, so I’m actually happy with them.