Calla Floral Long Sleeve Knit Midi Dress

it's sized weird. I'm 5'7, around 170lbs and have 32H boobs. I said that the dress is true to size but is it?? I tried the Medium in store but the arms were a bit snug and the buttons on the back were a B&%ch to button but the bust area covered just right yet the button over the bra strap in the back was weird. The dress fit like a glove otherwise. I decided to order the Large, there was no large in my store. It was delivered, the arms fit perfectly but the rest of the dress didn't. The bust area didn't cover my bra at all, it was way down (I might as well no have been wearing a shirt at the point of putting the dress on correctly) and the button over my bra strap in the back was way low. What on earth? The color is phenomenal, I have red hair and fair skin and the colors of the dress are my colors, actually either dress would be my colors. The buttons on the back are ridiculous. there are two, one at the base of your neck and the other about halfway down your back. I buttoned the lower button while putting the dress on (I turned the dress around to button it) and then flipped my head over to struggle with the top button. There is a tiny elastic string button hole but would break if you aren't super careful. Unless you have absolutely no boobs you have to wear a bra with the dress. I wouldn't say I have weighlifter arms by any means, either. I guess if your tall with no boobs and tiny arms try this dress. Otherwise, try it but my guess is that it won't fit right.