I guess that's what I was thinking when I said I had Chelsea stilettos. Not so much the heel, but the elastic bit on the side. The only reason I got rid of them is because they were size 9 1/2, which is in most cases simply too big for me, even with inserts, and these were even with socks. I never could make them quite work.
Now--off the subject a bit, but I reckon we all like a good story--I tried to do right by my "Chelsea" boots and give them to one of my son's female friends, who was probably 13 or 14 at the time, tall and willowy, and wore size 9 1/2. I do not believe she'd ever even thought about trying heels in her life. Just about the time I thought I had her convinced that maybe she ought to try them under my tutelage, it happened to coincide with the time she decided she wasn't so interested in my son, and she quit hanging around our house. Which in the end was a good thing for everybody.