8mm Brushed Matte Black Titanium Stainless Steel Classical Simple Plain Ring Wedding Band

Is it comfortable?

Do you make custom rings?

I want a ring for my middle finger with the size 7cm circumference, what are the options saying? is "7" in cm? It can't be in millimeters?

How can I make sure to get a size 5 unit? They seem to have wrong labels because I bought the item twice (size 5 on label), but they were 4 1/4 irl