The Mystery of the School Slipper: Size, Origin, and Legend
One of the most frequently discussed aspects of school slipper punishment is the apparent size of the slipper itself. A striking number of people who either received or witnessed slipperings recall the punishment being administered with a slipper that seemed exceptionally large—most commonly estimated as a size 11 or 12.
This raises an interesting question. Was this simply a child’s perception? Did the slipper appear larger because it was being viewed from a vulnerable position, perhaps while awaiting punishment? Or were unusually large gym shoes genuinely preferred and deliberately selected for disciplinary use?
The average adult male shoe size today is generally considered to be between sizes 9 and 10½, somewhat larger than averages during the 1950s, 1960s, and 1970s. If so many remembered slippers were size 11 or 12, where did these oversized specimens come from?
Many accounts suggest that the famous punishment slipper often appeared enormous. One former pupil recalled that when he was slippered during his first year at grammar school in October 1963, the weapon of choice was wielded by a notoriously feared woodwork teacher. The slipper seemed gigantic to him at the time.
“I estimated it as a size 11 then,” he remembered years later, “and I’ve seen nothing since to convince me I was far wrong.”
Yet memory can be deceptive. To a twelve-year-old boy wearing size 5 or 6 shoes, almost any adult-sized plimsoll would have appeared substantial.
The Size 9 Phenomenon
Interestingly, many schools seemed to rely on slippers around size 9. One former pupil recalled that his secondary modern school’s punishment plimsoll was usually a size 9, so much so that pupils jokingly composed a rhyme about it.
Looking back, however, he wondered where all these well-worn, smooth-soled size 9 slippers actually came from. Most pupils had smaller feet, and few would willingly donate their gym shoes for use as instruments of punishment. There was also the curious question of what happened to the matching left-foot shoes. Schools often seemed to possess a seemingly endless supply of solitary, heavily worn plimsolls perfectly suited to disciplinary purposes.
This has led many to speculate that the source was school lost-property collections. Gym shoes were frequently misplaced, abandoned, or outgrown, and changing rooms often contained baskets filled with forgotten footwear. A well-worn plimsoll with a smooth, shiny sole was often considered ideal.
Punishment by Borrowed Plimsoll
Not every school maintained a dedicated punishment slipper.
One pupil recalled a mass punishment in 1973 following misconduct in the changing rooms. Eight boys were lined up before the rest of the school. The physical education teacher asked each offender his shoe size and selected the largest available plimsoll from among them. The chosen shoe was only around a size 8, demonstrating that effectiveness did not necessarily depend upon size.
Similarly, another former pupil remembered two separate slipperings administered by the same teacher. On the first occasion, the teacher simply used a plimsoll left on the front desk, estimated at around size 5. For the second punishment, the teacher deliberately identified the pupil with the largest gym shoe available and selected a size 9 for the task.
The lesson seems clear: while larger slippers may have carried greater psychological impact, experienced teachers were perfectly capable of administering an effective punishment with almost any suitably constructed plimsoll.
A Question of Shoe Sizing
Adding further confusion is the fact that shoe sizing systems varied.
In Britain during the 1950s, children’s footwear sizes extended up to size 13 before moving into adult numbering. Consequently, references to a size 11 slipper do not always indicate a particularly large shoe. Depending on whether the speaker meant a child’s or adult’s size, the actual dimensions could differ considerably.
This may explain some of the apparent discrepancies in recollections.
The Lost Property Supply Chain
Former teachers have offered valuable insight into where punishment slippers originated.
One teacher, reflecting on his early career around 1970, described the changing-room lost-property basket as an almost endless source of suitable plimsolls. At the time, nearly every pupil wore plimsolls for physical education. Shoes were subjected to heavy use, their soles rapidly becoming smooth and polished before eventually being abandoned or replaced.
Among the forgotten footwear, certain examples stood out as especially suitable. Teachers often preferred slippers with flat, smooth soles rather than ribbed or patterned ones. Smooth soles provided a clean, consistent striking surface and were considered less likely to cause abrasions.
The most practical sizes tended to be between 6 and 9. Such slippers offered a broad sole while remaining easy to grip securely by the heel.
Some teachers occasionally asked pupils to provide their own gym shoes if they appeared particularly suitable. Others selected from several available options before deciding which one to use.
Over time, a number of staff developed favourite slippers that they kept permanently in drawers, lockers, or cupboards. These acquired a reputation and, in some schools, even nicknames. Their status became almost legendary within the school community.
Beyond the Gym Shoe
Although plimsolls were the most common instruments of slipper punishment, they were by no means the only type used.
In some boarding schools, carpet slippers were preferred. One frequently remembered example consisted of a tartan house slipper with a springy rubber sole. It was permanently kept in a convenient location where staff could retrieve it quickly whenever punishment was required.
According to recollections, the slipper had even been modified by removing part of the heel fabric, creating a more secure grip for the person administering the punishment. The alteration left little doubt that its primary purpose was disciplinary rather than domestic.
Unlike the imposing size 11 and 12 plimsolls of legend, this slipper was only around a size 8. Nevertheless, it acquired a formidable reputation.
Did Size Really Matter?
Perhaps the most interesting conclusion is that the effectiveness of the slipper appears to have had little correlation with its actual size.
Several individuals who experienced slipper punishment recalled receiving painful punishments from relatively modest-sized shoes. One former pupil noted that both he and his wife experienced considerable discomfort after their respective punishments despite the slippers involved being no larger than sizes 7, 8, or 9.
What mattered more was the experience and technique of the person wielding the slipper. A well-used size 7 plimsoll in practiced hands could be every bit as memorable as a supposedly gigantic size 12.
The enduring image of the enormous punishment slipper may therefore owe as much to psychology and childhood perception as to physical reality. To a nervous pupil awaiting punishment, even an ordinary gym shoe could appear alarmingly large.
Yet the mystery remains. Whether through exaggeration, selective memory, or genuine preference, countless former pupils continue to remember the school slipper as an object of almost mythic proportions—a humble piece of footwear transformed into one of the most recognisable symbols of school discipline in twentieth-century Britain.
