I just bought a pair of Frye boots (Carmen shortie). I think they fit OK with thin socks. But they are too tight with a wool sock (not a very thick one). I know these are firm and do have a break-in period, but wondering if I should see if they have the next size up. Or will they stretch? I don't necessarily want to wear wool socks but don't want the boots to be too tight. Anyone have experience with how much Frye boots break in or stretch? And how much wear it takes to break in?