“Great color but a little big and boxy”

“I am very curvy - broad shoulders, big chest, small waist, wide hips - and I am not sure this jacket is a good fit for me. I ordered the M and it was too big almost all around to wear alone. I really don't consider myself a "small" (5'4", 129#), but I am exchanging the M for an S. It might have been good as a winter shell with thick layers underneath, but as summer raincoat it was too roomy for me. The fit is boxy. I found it surprisingly roomy in the chest and back (hard for me), the fit was just right in the hips. Swimming around the middle. But I LOVE the color (green), love the weight, love the features, so hoping I the Small works and that I can live with the boxy look for the sake of utilitarianism.”