Runs true to size. This dress is a wonderful balance of materiel thick and snug enough to hold everything in and be extremely flattering but is still extremely comfortable! Though the top felt slightly loose on me (i could have worn a small but it was unavailable) I never felt unsupported. The length hit me right at the knee which I thought balanced the sexiness of the dress out perfectly but for those who want a shorter hem it seemed as though you could easily hike it up or tuck the hem under. I would definitely recommend this dress!