The rounded shape and large glass area were unusual compared with the three-box designs of the era. The Pacer's width is equal to full-sized domestic vehicles at the time, and this unique design feature was promoted by AMC as "the first wide small car." The Pacer was the first modern, mass-produced, U.S. automobile design using the cab forward concept. The Pacer's rounded and aerodynamic "jellybean" styling has made it an icon of the 1970s