Here are a pair of shoes I made a few years ago—my first experience with forming stainless. Those heels were a challenge. After trying conventional methods, and accumulating a sizable junk pile, I welded up a buck/hammerform from 1/8 inch steel plate with plenty of clamping screws to hold the sheet metal. Then I applied the heat—red hot stainless forms quite nicely. Once roughed in, the planishing was easy.
They are about 36 inches long and 32 inches tall.