something to say about "vanity sizing": in my late teen, early twenties, i weighed about 115-120, and the clothes i bought were a consistent size 6.
today im around 105 lbs and double zeroes are often times pretty loose.
there is no "standard" for clothing size labels, which is unfortunate. it really varies greatly from brand to brand.
best way to keep actual track is to take your body measurements yourself. i wish i took body measurements when i was a young thing so that i would have had some data to compare with.
in any case, the message im trying to convey here is that your progress cant be reliably measured based on clothing sizes that you buy. its all about the tape (i.e., measuring tape), baby.
good luck! ❤️