I have poor circulation and needed something to wear to protect my hands from the cold when riding a bicycle at night with my dog.  These are nice because I can easily grip the bicycle handle and stay warm at the same time.

I bought a size 6 and I have long fingers for lady hands.  It fits perfectly.

I gave this a 4 instead of 5 because at about 40 degrees, I still need to wear and thin running glove as well, but I think that is due to my poor circulation and not a fault of the gloves.  Even with ski gloves I often need the hand warmers.