Perfect fit for my 35-year-old, real Canadian Sorel Caribou boots. Go with TFS measurements chart, and you can't go wrong. I'm a US 9.5, but I ordered size 9, based on the chart. Glad I didn't up size as 10s would definitely not fit in the boots. The 10" high liners extend about an inch above boot tops. No cuffs, no biggie. They're made almost entirely of wool--way better than 100% synthetic materials Columbia now uses in its Sorels. Free shipping was fast--only six days.