Plumpfaerie:
For me, it's feeling my belly roll over the waistband of whatever I'm wearing and touch my thighs whenever I sit down (it's only starting doing this recently.) Also, I keep occasionally bumping into things because I forget how much it actually sticks out now.
As an autistic person, I struggle with spatial awareness and regularly bump into things as I can't feel where my body ends and the outside world starts.
I was obese until 10 years ago when lost half my body weight due to anorexia.
It took me a long time to mentally adjust to how much smaller my body had gotten.
In restaurants, I'd still push chairs under tables to make way for myself, until a friend of mine pointed out I didn't need to do this anymore because I was so skinny.
Having involuntary gained a significant amount of weight in the last few months, I keep underestimating how much more space my larger body takes up.
I recently moved to a smaller apartment and find it very unsettlingly when parts of my body brush against the countertop or my kitchen chairs (although the space between them is objectively very narrow).
Same with clothes...
I remember that when I was very skinny I'd look at a piece of clothing and think "this is tiny, there's no way it fits me" and often there would be room to spare.
Now, it's the opposite. I'll pick up at a pair of size 29 or 30 jeans in a store (I used to wear size 25), put it in front of me and think "this looks large enough to fit" and then I'm mortified when I can barely zip them up.
Body dysmorphia probably has something to do with this, but I feel huge and disconnected from my body.
It brings back traumatic memories of clothes shopping at my heaviest when the largest size available in regular stores was very tight or didn't fit at all.
My limbs were disproportionately large compared to my midsection, so I'd dread trying on tops (most blouses' armholes were too small so I eventually stopped trying to find one that fit) and pants (unless the fabric seemed very stretchy).
I just couldn't accept the fact that I needed to shop at a plus size clothing store...
This is why I've been procrastinating the process of going through my wardrobe to see what fits and what doesn't. IDK what to do because I need to do it (I have a lot of designer clothes that I might be able to sell to get back some money)...