This top is absolutely stunning! I purchased this off Poshmark live - and I think the seller measured incorrectly by mistake because it was sold to me with a Ptp much smaller than it ended up having. This piece is beautiful and I wish it was my size! I would say this fits like a modern L-XL depending on fit desired. Ptp 21” - designed to be fitted but also looks pretty relaxed which is why it could work for L or XL in my opinion. Beautiful crisp white - airy cotton feel. A lovely staple with intricate special details