Stephensen's hollowware designs for Jensen are characterized by subtle lines and unornamented forms. Many of the pieces draw on traditional Japanese design. In fact, Stephensen wrote a book called "Brugsting Fra Japan" ("Useful Things from Japan").
Stephensen's work was included in many important exhibitions around the world and he received many prizes. He was awarded the Eckersberg medal (1948) and several medals at the Milan Triennale.