3x4 with 1x4 total area in loft but only 1x3 is usuable loft. There is one grid that is for storage. Ramp is made from a pvc pipe cut in half lengthwise and secured to the loft grids by wire. There are two cardboard supports, the one on the left is more for decoration and the one on the right actually supports the upper corner area of the loft. There is a 1x2 box made from coroplast for hay in the loft.