That method is actually used by many shoemakers when you order a pair of bespoke shoes (in combination with a series of tape measurements). It's not accurate enough to produce a fitting shoe in a single attempt, however, so what usually happens is they make a "test shoe" based the measurements and drawing, then modify the last after having you try that on. This procedure can be repeated more than once if needed.
Knitted socks are quite a lot more forgiving than leather shoes, fortunately, since the material accommodates by stretching when you put it on. I'm not surprised it worked well for you and your aunt!
Knitted socks are quite a lot more forgiving than leather shoes, fortunately, since the material accommodates by stretching when you put it on. I'm not surprised it worked well for you and your aunt!