In the 1950s, a single was as wide as the average person’s shoulders. A twin was a single & a half. A double was two singles. A queen was a single & a twin. A king was 2 twins (or 3 singles). Nowadays, the single is forgotten, so everyone is confused. When I was a child in the 1950’s, my bed was a twin and you could put two first graders in it side by side. My best friend had a single bed, so when I slept over at her house, I slept in her bed and she slept on the floor.
EDIT: I don’t think that that’s correct, though, because while beds have become larger, it sounds like the twin was very much around in the 1950s.
According to this:
https://english.stackexchange.com/questions/27810/why-do-americans-call-single-beds-twin-beds
EDIT: I don’t think that that’s correct, though, because while beds have become larger, it sounds like the twin was very much around in the 1950s.
https://www.ebohemians.com/a-guide-to-antique-bed-sizes-understanding-the-history-and-variations/