The external dimensions are 27.75 x 17.5 x 18.25 in. Internal volume is approx 3.77 ft^3 before displacements (rounded corners, sub, etc.) The box is double baffled for both the sub and 3 external aeroports (not included). The whole box is resined and easily fits in an extended cab truck. I am only getting rid of it because I can't use a resined box in AS1. This box did the scores listed in my sig. I would prefer to do local pickup, but if anyone is really interested I will ship. Please PM me if you have any questions. $60 + shipping.