By my own fault, the 18mm band turned out to be slightly narrower than I needed.  That was remedied by a quick order of the 20mm, which was the perfect width.
The band is we made of heavy, strong materials.  What I like so much about this type of band is that if you loose a spring pin, you don't loose the watch.  The watch will hang on the second pin.  Using a watch for activities with backpacks & other possibilities for snagging my watch, this has happened to me a couple of times.
However, the length of the band is not my mistake; it's not as long as the original Waterborne watchband which I sold & used for many years.  I'm female, & have an average sized wrist; the band will work, but I will not be able to "weave" the length through the flat rings for the added security that I'm used to.  Once I put it on top of my wetsuit, I won't be able to "weave" it at all.  There is NO WAY this band would work for my husband who has a large wrist.