I typically wear 38/40 DD and am 5'7.5". I purchased and XL. The jacket is stretch, not too much. The jacket fits well and I really like how slender it is on my wrist. Really glad to have found a Jean jacket with pockets and buttons for this price. I am very pleased with the jacket.

*my pic is me trying it on right out of the box, don't judge the way I was dressed*