I am generally an XS or S in tops. I have several Peace Collective crew necks sweatshirts (which are unisex sizing), all in small. I find them slightly oversized and wanted the cropped sweater to actually be slightly cropped. (If you are familiar with the cropped quarter zips from Aritzia, I wanted it to fit that length). I asked in the chat if the quarter zips were unisex sizing or women's sizing and they said they were women's so I went with the XS this time. It fit me perfectly everywhere but was slightly too cropped for my liking (a good inch or so above my belly button, and several inches above my highest waisted jeans). I returned it for the small, which fits exactly where I wanted it to length wise (right at my waist, tiny bit of skin showing) but the sleeves are much longer. I have long arms and things are often too short on me, so I am not unhappy about longer sleeves, just something to note. I've attached pics in the small and extra small and for reference, I am 5"3 (and a half).

I cannot say enough good things about the customer service and attention from PC too btw. From the beginning of this transaction to the end they were attentive and wonderful. Thank you! Love it.