If I ever get a free Saturday again! But the trouble is I'd be uncertain whether to buy without spending half an hour stamping up and down in the shop pair*, which the assistants might not like.

* You don't get to take a pair home on the spot. You try on pairs in your foot and calf size, place your order, and they deliver it a day or so later. Presumably they couldn't store all the possible combinations of foot and calf in significant numbers.