Riding gloves

Interested in these for a friend but don't know her exact size. Do you know how they compare with regular sizing please?
 
I like the fleecy lined Roeckls, but last time I tried to buy a pair online I couldn't work what all the different models were called and ended up with non-fleecy ones which were no good for me! But posh tack shops tend to stock Roeckls. They're very hard wearing and mine have stood up to two years of me doing yard jobs in them as well as riding (bad, naughty me)
 
The Harry hall fleece lined ones I just got and rate them, would recommend sizing up though but are very cosy
 
Top