Really. Don't buy skirts as presents if you're a guy. Meaning without your girlfriend/friend/whatever to help you. It's just how it is. I spent quite a lot of time earlier at Vivo trying to get one, and it took lots of effort just finding WHICH shop to get it from (but that's Vivo's fault lah..so bloody big and crowded!!).
Knowing the waist size isn't good enough..and it's not because of patterns on the skirt or whatever. I was in this shop where there were so many different cuts for skirts of similiar waist size...and it's not just the length, but the material and the width of the hem of the skirt that makes it all so complicated. The thing is, you just
know that all this is somehow
supposed to matter but as a guy, you really don't know why!
Well, anyway, if you want to get a skirt for a Christmas or birthday gift...just don't. Let the girl buy her own skirts.