Thin privilege is not, while in high school, being so terrified of going up a pants size that you literally keep wearing and buying pants so tight on you that you cannot breath in them. When in high school, someone told me anyone above a size 8 was huge. At the time, I was a size 12. When that got too small, I kept wearing it, even though my size 12 pants would dig into my skin and leave angry red marks and sometimes even leave cuts and skin abrasions in my hiplines, even though they barely came up enough to cover my butt, even though I could not sit down in them or eat in them. Now, I am a size 16-18 (and of course these sizes are more difficult to find, which is a whole other issues) but I have problems with breathing because I retrained myself to breathe when I was wearing too tight clothes. I hold my breath a lot and take very shallow breaths. I’m now working with a physical therapist and taking yoga in order to learn to breath properly again. I am also seeing a psychologist for anxiety which is partially about size and weight issues.

Thin privilege is not unnecessarily compromising your own health because you’ve internalized bigger = disgusting to such a high degree that you develop breathing problems and mental health problems related to something as seemingly trivial as clothing sizes.