When I got the slipper it was my own – the headmistress demanded I hand one of mine over (we called them “pumps”)
The one & only slippering I got was in 1st year at Grammar. I was an 8 then, the slipper used by Nogger Knight, Woodwork Master, ex-Desert Rat, and present-psycho looked suitably flipping enormous.
I estimated it in Oct 1963, when it occurred as a size 11 & I’ve seen nothing since to convince me I was far wrong!