Save & Splurge! I found this nearly identical amazon dress to my revolve dress. Both Medium to play fair The revolve one (right side) needed to be a small while the amazon one was just right/little tight in chest in the medium.

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Commissionable links
SweatyRocks Women's Long Sleeve V Neck Button Front Dress Elegant Belted Mini Sweater Dresses | Amazon (US)
Natalie Belted Dress in Ivory & Black | Revolve Clothing (Global)