What do you call a 4'9" runaway psychic?

All my life I've thought that, in terms of clothes, small, medium, large and extra large meant:

Small: teens

Medium: tiny adults

Large: normal adults

XLarge: bigger adults

I know that all sizes vary between brands but generally, I kinda thought this was the way it was. I often blamed my giant muscular thighs and calves for the fact that every pair of large yoga/jogging pants I ever bought didn't quite fit. And by "didn't quite fit" I mean they always slowly and annoyingly rolled or slid their way down to the sweet spot at my c-section scar and sat there. That or I'd have to hold them up throughout a whole run. Which I've done more times than I care to admit.

So imagine my surprise when I accidentally bought a medium sized pair of exercise tights on the weekend. For some reason I tried them on before bringing them back and I was shocked. Is this the way these pants are supposed to feel? All snug and wonderful? All stay uppy and non-rolly downy? I may never take them off.

kxx

PS: The punchline to the joke is... a small medim at large.