I have ridden the Gaerne Polar's twice now.
The first ride it was in the forties and very windy. I thought they might be too warm but my feet did not sweat at all. I was surprised that they would have that broad a range.
The second ride was New Year's Day with temperature around 30 degree F. and very windy. The wind chill brought the temps down to 20 degrees or the high teens. I wish the shoes were slightly warmer but they were a big improvement over summer shoes with booties as far as warmth or convenience. As long as I remember to wiggle my toes my feet will not get uncomfortable. A riding buddy is considering putting chemical warmers on the outside of his Lakes and I may try that also. I wish that I had not waited so long.
If I had not found the Gaerne's locally and already purchased them, I have read good things about these and it is a great price. Mail order is tough when it comes to shoes. Maybe you could do a search and determine sizing.
http://www.wiggle.co.uk/p/Cycle/7/No...ts/5360032089/