This BHLDN Beckett Satin Charmeuse Maxi Dress in Champagne color, size 16 is for sale. I wore it once as the Maid of Honor for my sister's wedding, and got it professionally dry cleaned immediately afterwards. It has not been altered in any way. I typically wear a 14 or 16 street clothes, and this fit like a glove. I hope you'll enjoy it too!
Here is BHLDN's link to the dress: