BjossiI just got mine delivered this week. I don’t have calipers handy but it’s pretty thick. I can’t slide it between the springbars and case of my Seiko sarb033. Have to place the strap and then snap in the bars. Kind of annoying. Strap is definitely high quality though. I’m thinking it’d work better on a Hamilton khaki with the longer lugs. (But I don’t have one to try).
BjossiThey vary from 1.2mm-2.1mm in general. We tend to use the thinner areas for 18mm and 20mm wide straps and the thicker pieces for 22mm-26mm widths.