Many different kinds of railway cars were used for deportations. They varied in size and weight. The railway car on display in the United States Holocaust Memorial Museum's Permanent Exhibition is of just one type used. The dimensions of the railway car in the Museum's exhibition are as follows: Total length 31 feet 6 inches (9.6 meters); interior space for deportees 26 feet 2 inches (8 meters). Total height 14 feet (4.3 meters) from the bottom of the wheel to the highest point of the car; interior space for deportees (ceiling curves down from the middle): 7 feet 4 inches (2.2 meters ) at the center; 7 feet (2.1 meters) at the sides. Total width 13 feet 2 inches (4 meters, including the roofing); interior space for deportees: 8 feet 10 inches (2.7 meters).