Phone scan of your foot → measurements and sizes → a 3D-printable shoe, insole or last (STL / 3MF).
One foot per upload. Scan the other foot as a second upload.
Infill per zone (gyroid):
A last is the foot-shaped form a shoe is built around: use it to design your own shoe in CAD.
Scans are kept for 30 days so you can come back and change the design, then deleted.