Keswick sleigh bed is available in twin, double and queen sizes. The twin and double sizes are shipped with an eleven-piece slat roll for mattress support and feature a two-position railmount. When railmount fixed in the higher position, the twin and double beds accommodate the under-bed storage options: trundle box and mattress, the two-drawer storage unit (11111shown) or the rolling storage cubes. The queen bed is shipped with a metal mattress support system and does not accommodate the under-bed storage options.