VINTAGE J.CREW navy cotton polka dot sundress

Purchased this but the vintage sizing wont work for me. It fits closer to an 8/10. I even purchased a second one in the hope of having it altered but I don't need to start a project lol. The other one has a slightly different neckline. I will post measurements if interested! Its a perfect wedding guest dress with a cardigan and pearls. Feels very East Coast chic!