LOVE this hoodie.
Picking a size was a challenge online since I could wear an XXS, XS, or Small, depending on the brand.
Since I am here to help:
I'm 5'4" with a curvy, slightly athletic build. In Athleta I usually wear a Small (XXS or XS if oversized), and in Lululemon I wear a 4 in tank top and a 6 in a hoodie. I wear a Small in G2OH unisex hoodies.
I went with the Small and am happy with it. It is fitted, yet slightly loose, and just covers my assets. It is also super soft and warm, without being bulky. I have long hair so I prefer the forward facing styles. I would love to see more of the hoodies in a true red and royal blue.
I could probably rock an XS if I wanted a super fitted look.
I did have to reach out to customer service with a minor issue. They were lightning fast, personable, and quickly made things right. I will definitely be adding more of these hoodies and hooded long sleeve shirts to my gym apparel collection.