@grislybutter Do you mean 7 inch EPs? (extended play). The Beatles issued quite a few in the early-mid 60s. They were mono, as I recall. I had most of them at the time, gone now I think my brother has them. They played well but were a bit flat at the frequency extremes. But then my father's record player wasn't up to today's standards (Garrard, then Goldring Lenco - he was into hi-fi). Mono cartridge with stylus as fat as you like.
The Beatles were lucky. Their contract was with EMI. The Stones were luckier - Decca. My original UK 'Aftermath' has great sound by any standard. And nearly 30 minutes per side for goodness sake. Of course Decca famously turned down the Beatles in 1961.