HUGE!
I always wear a medium and Lulus dresses which I think are fabulous. Based on other reviews, I sized down because I don't like a real Flowey dress. So I got a small. It was huge. I mean really huge. Like two people could fit in it. It is made beautifully and had there been less material I definitely would've kept it. Sadly I could not.
Response from Lulus.com:
Hello Rachel! We're sorry to hear that this dress fit larger than you expected. If you would like additional insight regarding sizing for future purchases, please reach out to our team of fit experts (lulus.com/customerservice). We want to help you shop with confidence! Thanks for your review! XOXO