Universal Standard Thames Fog sheer long sleeve midi length dress in slate grey. Universal Standard size M/medium is a size 18-20. New with tags. Nylon/elastane. This piece is sheer genius. The Thames Fog Dress is the most versatile layering tool in your arsenal. Wear it over a tank and jeans for next level of cool, under a mini dress to take your style to new length, over your slip dress for a simple sexy look, under your favorite sweater dress for a sheer detail, or over your bra & panties when you dare to be bare! Slip/bodysuit not included.