This Full size Loft Bed with Desk is made of very thick Solid Pine Wood, and not flimsy, wobbly, or shaky. The outer dimensions are 82"L x 58"W x 70"H. The desk is 30 inches from the floor and is 76 inches wide. The top bunk has a weight limit of 500LBS. A Full size Mattress not exceeding 8.5 inches in thickness is needed for this bed.