Since you only sell 20 mm straps for men's watches, I assumed that it would fit my Berg men's watch. But, my watch is 38 mm, and only after I received the strap did I find out that my (some years old) watch needs an 18 mm strap.
In dialogue with Paal Friele Grung I am now about to return the 20mm and receive an 18 mm i stead.
My suggestion: On your website, please put a note that your straps don't fit 38mm watches. Or even better: Keep 18 mm straps in store and sell them actively.