18 inch doll Trundle Day Bed. This trundle bed will give your 18 inch doll and her BFF a cozy place to sleep at that next sleepover party! This solid white bed measures approximately 21″ long, 9″ high and 9″ deep. The height of the trundle bed is approximately 4.5″ high and slides out when in use as a bed. Included with the bed are two sets of a mattress, a pillow and a comforter. One side is a striped and the other side is a coordinating polka dots. This bed requires some assembly and ships flat.