This is a two piece dress from BHLDN. The skirt is a floor length tulle skirt with a floral pattern in shades of beige, pink, and purple. Approximate length is 47 inches with a natural waist of 38". Style number: 38142865. And the top is a convertible corset top with ruched tulle and a sweetheart neckline. Style number: 39121801. Approximate length is 9 inches, bust 44" and natural waist 37". It is a solid color in latte. The top also comes with tulle material to create straps.
Here is the corset top at BHLDN: