Goldilocks Shopping
As you’re probably aware, clothing sizes are wild.
With inconsistencies through time, across brands, and before and after washing, the letters and numbers on our clothes are nearly meaningless.
In addition, to get the look you’re after (i.e., fitted vs. flowing), you may need to size up or down from the size you’re used to.
To bring a little sanity to your shopping, shop like Goldilocks, and try on that shirt/skirt/jacket in 3 different sizes: the size you think will work, one smaller, and one bigger.
Then pick the one that you like the look of the best. Go entirely by feel/look: you don’t even need to look at the tag of the winner!
Source
How to Date Your Wardrobe: And Other Ways to Revive, Revitalize, and Reinvigorate Your Style (2021) by Heather Newberger