Just a heavy brass hook at a level just below my bent elbow. Gives me a horizontal stroke. Haven't changed the height since I put it in a few years back.
Attachment 180215Attachment 180216
I keep others not in use, or being improved, or coming and going, on the back of the door.
~Richard
PS. I use a special oil and Pure neetsfoot to slowly renew a strop over a couple months. I use information found on line and in conversation with leather workers.