I have had the Bramblers,ORs, and my hunting partners a few of the others. And most seem to me to run really on the large around the calves unless you have thick pants on. Have to cinch them up almost to the limit and they still loosen up. I tried these from King's this year and they fit the best so far. The latest from Stone Glacier also look like they solve this issue.

https://www.kingscamo.com/products/xkg-leg-gaiter-3