I am 5'5", 108lbs, small 32B and was stuck between a regular xs and a petite xs. The regular xs was a little too long and too loose/ wide. The petite xs looked perfect but it was definitely a little too short where with my arms to my sides it was a few inches shorter than my fingers. If you want a s...exier look I recommend the petite xs, but if you want a regular fit then stick to your regular size. The petite version is definitely made for petites unlike a lot of Old Navy dresses where the petite fits more like a regular. The dress looks weird if you try to adjust the shoulder straps to shorten the dress because It lays funny across the chest. It is fully lined but wrinkles easily. The green dress with stripes is absolutely stunning but you will have to steam it before wearing and it will wrinkle when you sit. The black one is safest to avoid wrinkles. Aside from the bIack dress, I don't think the other colors will survive a beach bag because it wrinkles.