When I put on a pair of medium undies and ripped off the waist band when I tried jumping to fit my ass in them 🙊 that was years ago and now I’m filling out XL undies
Seeing a waist measurement in metric is this for Americans. Seeing an imperial weight is this for non-americans. Anyway, I have a 140 centimeter plus waist.
Maybe not the first, but certainly one of the most memorable - feeling my hips brush both sides of the train station ticket gate as I passed through it.
More recently I've had to be selective about which gate I use because there are a couple that are narrower than the rest and I accidentally used one of them recently and it was tight squeeze. I use the wide baggage gates whenever I can.
A few times seeing myself in a mirror or picture. But mostly when I put on clothes I haven't worn in a little bit and they either don't fit or are skin tight. Also when parts start to jiggle. From either running, while in the car, etc.