United Nude are wonderful. Their shoes are fabulous, beautifully designed and made and uncompromisingly detatched from the catwalk brand names.
I should have bought the Mid and the Lo height too. For me, these are taxi shoes, ones that you aren't going to wear for walking around town all day. That said, they are amazingly comfortable for their height, and because they surround the whole foot they are completely stable.
Shiny gold, wrapped with black elastic, they are stunning and will be stared at. Strangers will stop you to admire them.
Size: I'm normally a UK 5.5 or an EU 38.5. In these I take a 5, but that's not the same for all United Nude shoes.
Helix and Fold come up big, so if in doubt, get the smaller one.