Metric vs Imperial

I wanted to reorder some clear stickers with a colour change ( reverse black/white ). I started with a previous order and just asked for colour change. I thought everything else would be the same. I didn’t realize they changed the size. Looking at the proof it was in metric size but the last order was in imperial…. I didn’t notice the difference. The stickers came in a smaller size than original order. I should have looked closer at the size but didn’t convert the metric on the order to inches. I can still use them but not really what I wanted.