The bottom bar sets at 5.3, 6.7 or 8 in, which is what lets this frame clear the cistern on tanks of different heights - a fixed bar is the usual reason an over-toilet rack will not fit. The hollow measures 27 x 7 x 31 in. Storage runs to a top shelf with a raised lip against falling bottles, two open compartments and a single-door cabinet. Total capacity is 100 lbs across a 34.5 x 7 x 39 in frame in MDF and engineered wood, weighing 29.5 lbs. Only 7 in deep, it stays clear of a person standing at the basin.