long sleeve knee length dresses Black Satin Midi Dress with Sleeves and Open Back Pair it with a handbag and heels for a magnificent look Women's Long Sleeve Dresses Round

- Premium brushed jersey

Jacket USMC FEMALE ENLISTED DRESS BLUE COAT Blue Dress Skirt USMC DRESS BLUE SKIRT Collar Devices USMC ENLISTED DRESS UNIFORM COLLAR DEVICES Chevrons USMC SERGEANT SEW-ON CHEVRONS Service Stripes Badges Marksmanship Badges Qualification Badges MARINE CORPS REQUALIFICATION BARS Identification Badges Nametag USMC PLASTIC NAMETAG FOR SERVICE AND DRESS UNIFORMS Ceremonial Belt USMC WHITE WEB COAT BELT Belt Buckle U.S

They are soooooo soft

XKCD did a nice example in The dresses are identical, the background makes all the difference

Completing the classy look is a sheath skirt that finishes at below the knee with a sheer scallop hem

Jumpsuit Jumpsuits are another good option, especially for longer services as you can comfortably walk, move, and sit in them