The garment measurements can vary greatly from the size chart listed. So to be sure about the sizing, you should call customer service and they can read off the exact measurements.

I just purchased a sweater dress which seemed like it would be a reasonable fit, but it was about 3 sizes too large. Turns out the garment measurements were indeed much larger than the size chart measurments. Customer service was lovely and I'm returning the dress without any difficulty and on free return shipping.

So I guess I'm SYC +accessories for real now given that I had to return my dress purchase. . . =)