In Poland, a large shoe retailer eobuwie does this with their esize.me[1] service. You can go to one of their (or affiliated) stores, scan your feet, and then use the scan to purchase shoes online later.
I only tried it once but it worked very well. Suggested a smaller size than I would have purchased and they fit perfectly.
Clothes are probably significantly more difficult than shoes though.
It didn't work for me at all. I used the machine three times and always got different results. That was 2 years ago so maybe they improved, but I was very disappointed, especially with heel width.
I only tried it once but it worked very well. Suggested a smaller size than I would have purchased and they fit perfectly.
Clothes are probably significantly more difficult than shoes though.
[1] https://www.esize.me/