They need exactly one 50g skein (90 meters), size 38 (French) and less than six hours.
Slippers Roussel
Toe up, heel knitted flat and sewn.
ID - Aiguilles magiques 2014
A ball that was a leftover of a machine knitted sweater made in less time...
Seams of the heels
Can you see them ?
ID - Aiguilles magiques