tank swim dress Attraco Women's Tennis with Built in Shorts and Bra Pleated Golf Dress Seamless Athletic Dress Navy M piece suit underneath 82% Nylon / 18% Spandex Swimsuits for All Women's Tank

Pretty much any dress with good support can qualify as modest

High-Low Satin Dress, $86 Va-va-voom

This is why many dress shirts feature those vertical folds on the back

I even had a last-minute emergency where I needed extra lace on my dress for modesty and they gave me a beautiful piece that worked seamlessly with my dress (by the way if you're getting married in a church I would recommend buying an extra piece of lace ahead of time from your dress designer when you buy your dress, mine was only $6

This style comes in an assortment of sizes including regular, petite, long, plus, and plus long with cup sizes available up to DDD