Kim and Kourtney Kardashian were peak 90s in a throwback snap.The 42-year-old SKIMS mogul and her 43-year-old older sister - who were recently featured in a stunning family Christmas portrait - were featured in a throwback snap posted by Kourtney's lifestyle brand Poosh on Tuesday.The sisters were the perfect picture of 1990s fashion as they each sported pencil-thin eyebrows and spaghetti strap dresses. Bond: Kim and Kourtney Kardashian were featured in a throwback snap posted by Kourtney's lifestyle brand Poosh on TuesdayKim and Kourtney wrapped their arms around one another in the cute snap.