Stradivarius long sleeve midi dress with cut in green and black swirl - size M

Slinky Stradivarius midi dress with cut out in a green and black swirl. Cut out is adjustable by tightening or loosening the strings. Labelled a size M but is on the smaller size. Would best fit a size 6. Dress only worn twice so in very good condition - no stains or tears. There is some color drop out on the back of the dress at the top where it connects. Last photo shows the fault in the fabric. Dress perfect for A/W and could also be worn for a 60s themed party or Halloween.