I was super nervous about ordering because I was afraid the fabric would be that really clingy material but I was so happily surprised that I was wrong. I am SO SO glad I finally ordered this dress I've been eyeing for years. It's so so cute and the fit is perfect! Definitely trust when it says size up. I took my normal measurements and looked at the size chart and determined I should be a M, so I ordered the L and it's just right.