This Twin Bed is made of very thick Solid Pine Wood, and is not flimsy, wobbly, or shaky. The outer dimensions are 82"L x 43"W x 34"H and has a weight limit of 400LBS. A Twin Mattress not exceeding 10 inches in thickness is recommended for this Twin Bed. 
 
* Trundle and Mattresses sold separately, Bedding and any other accessories in the picture are not included.