Ive lost some weight and I could previously fit in a size 4 at the weight I am. But now I need a size 6. Whereas I have old aligns where I was 10 pounds heavier and the 6 fits perfectly. I used to be at this lower end of weight before and fit into 4’s really well.

Is it just me? My old aligns are about a year old or more. Not sure if I just stretched them out if there has been actual change in the past year.