It doesn't happen anymore, but when I was younger I would often get strange sensations regarding scale that I never heard anyone else report.
There were two different flavors. One felt like the room and everything in it were both small and large at the same time. If I were to ask myself, "Do I feel like I'm small in a small room, or huge in a huge room?" I would say, "both, at the same time".
The other happened only in my mind. Roughly speaking, it was a kind of tactile sensation. It felt like I was sort of... "handling" an object, perhaps pencil-shaped, that was skinny and fat at the same time.
It happened most often when I was about to fall asleep, but it sometimes occurred in the middle of the day.
Is this sort of thing known and documented? Is there any sense to be made of it? I tried to search online but had no luck. What would I even search for?