It might be a little less drastic as it seems now lol. When I got them they measured 17 3/4 inch flat. Now, after wearing them around a year and with multiple soaks and 2 machine washes at 60 degrees celcius they measure just under 17 inch. Still, some notable shrinkage? Ofcourse they will stretch out a little but not to 17 3/4 I’m sure.
Here’s an image, I can’t get it to show here, don’t know why: https://imgur.com/a/eG5Q52b