Parallel to his poetic work, Piet Hein decided to find an absolutely harmonic physical design. With mathematical intuition he first found the form and then explained it afterwards. His superellipse was to solve the double contrast between the circle and the square and that of the ellipse and the rectangle. By means of mathematics he found a harmonic geometrical figure which was first used on a large scale in connection with the solution to a town planning problem in Stockholm. Within furniture design the superellipse also became the solution to various problems - especially in relation to Piet Hein's design of tabletops the superellipse became popular.
Piet Hein is among the Danes which have received the most awards in the twentieth century. In Denmark he has received the Aarestrup-medal ( 1969), the Industrial Design-prize (1971), the Storm Petersen-prize (1978), the Medal Ingenio et Arti (1985), the annual prize of Danish Design Council (1989) and the Tietgen Medal (1990) as well as honorary memberships of the Students' Association (1970), the Royal Copenhagen Shooting Society (1978), Det Danske Broderskab (the Danish Guild) (1978).