Stella McCartney velvet dress - Size M/L

Purchased from a luxury consignment store. Size large (44), but I feel it would be best for a medium to small large. Zipper on cuffs of sleeves. Zipper down back. Criss-cross lacing on side for visual interest or to cinch in to adjust size. Excellent quality, inside seams professionally finished. I was told the color was navy blue, but it is so dark it is almost black.