Fits well, and my feet don't get too hot. I definitely will wear these for the rest of my life!
I've been wearing these for 5 days straight and they still feel good and don't smell. Merino wool never ceases to impress me. They're advertised as One Size but the package said Large, which threw me a little when they arrived but Sox Shop was quick to assure me I had the correct sock and they fit me great (women size 8.5). They're not as cushioned in the heel and toe as I'd like but I love that they're Canadian made and I think every sock I buy from now on will be Merino wool. This is my second Merino pair and they're fantastic. Comfortable and breathable. Just hang them up to air over night and wear them again. I used to buy "economy" socks (10 for $10 type stuff) but you need fewer of these in your drawer to get the same use, and enjoy them way more, and you support a local economy. Win-win.
I have thin legs, but find the sock quite tight around the ankle and lower calf. I think it would be improved if slightly bigger leg/ankle. Otherwise they are great!