L.K. Bennet X Preen black velvet dress with highly jewel embellished neckline, fitted bodice, two tier skirt with an 120" hem sweep, U.S. size 6, excellent condition, with no signs of use and all jewels firmly intact, my camera did not capture their shine.

Dress entry is by back zipper, the ends of each sleeve have zippers, as shown in the photos, 

Found an article on line from 2017 written for Refinery29, by Channing Hargrove, "L.K Bennett x Preen Patti Velvet Embroidered Dress, $825, available at L.K. Bennett"-this was the 2017 price, and is one of Kate Middleton's favorite designers.

Took a couple shots of the dress inside out to best show the cut and shape of the skirt.    Due to the weight of the fabric, which has a soft silky inner lining, the full sweep skirt will drape nicely, which is show best in the two stock photos.

The main fabric is 85% viscose/15% silk, the bodice lining is 96% polyester/4% elastane, the sleeves and skirt are not lined but have a smooth, soft, silky feel that is the backing of the velvet itself.  

Following are the flat, external measurements which I took inside out for a more accurate measure, some of the dimensions are doubled.

Bust-pit to pit-34 1/2"     Waist-26 1/2"      Bottom Sweep-120"     Length-42 1/4"

Shoulder to shoulder-16"     Sleeve length-23 1/4"