I made those lovely knitfelted house slippers, made with Lana Grossa Feltro wool in grey with white detail. Please note the slippers are slightly different each.
 
At the front I attached a detail in form of a strap secured in place with a flower button. 
 
The sole is made safe by adding little dots of sock stop, which should prevent you from sliding on slippery surfaces, such as wood floors or tiles.
 
The shoe lats your can see on one of the photos are not included. However, the lats are size 7 (41). The lenth of the slipper from tip to heel is ca 26cm and about 11cm at the widest part across.