I think someone made 1mm spacers from a plastic ball point pen tube. One on each side of the strap should do the trick. :-!
All I can say is that it is likely I still have my right hand, only because I was wearing a watch, with a stainless steel bracelet. A long, long time ago, in a land far away...On the other side of the argument, you probably shouldn't be wearing anything (jewellery, watches, long hair, bracelets, anything) if you're using a hazardous piece of machinery. Whenever I've used a table saw in the past, I took my watch off, even my thin W-71, with a plastic strap.