I was a little bit curious to see just how narrow my skinniest wedges actually are, and I have come to the conclusion that they simply don't achieve stiletto status in any dimension. If you will refer to the picture below, you can see that the middle of the wedge narrows more than the part that actually touches the ground. This narrow part measures 7/16" wide, or just over 11 mm. The heel cap measures 5/8". This is obviously skinnier than the Victoria Secret "stiletto" wedge, and yet even it is still too big to be a stiletto, so not only is the marketing a contradiction, it's an exaggeration in any dimension. That being said, I think that the VS wedge is well proportioned, attractive, and not enormous. They should make all wedges that way, they just shouldn't call them stilettos.
I shall have to check one of my wife's many closets, I believe she may have a couple pairs of actual "meat cleaver" shoes, as Shyheels so aptly and humorously called them. If I find them, and if they are indeed as narrow as I remember, I will post a picture. They are buried in a closet somewhere because she brought them from Vietnam 15 years ago, gave birth to our son less than a year later, and her feet grew a size larger permanently. It's a common problem, I understand.