If you need an extra 3 inches clearance under your Charleston Platform bed, swap out the existing legs for these longer versions. The foot board legs are 18" (rather than 15") and the head board legs are 43" (rather than 40"). If you have a king size Charleston Plus and purchase these extension legs, please note that in the "special instructions for seller" at your cart or email us through the "contact us" tab. The king needs an additional 2 center legs.