By a Nose (German: Um eine Nasenlänge) is a 1931 German sports comedy film directed by Johannes Guter and starring Sig Arno, Lucie Englisch and Elga Brink. It was made at the Halensee Studios in Berlin. Location shooting took place at the Berlin Sportpalast. The film's sets were designed by the art directors Emil Hasler and Otto Hunte. It was remade as a 1949 West German film of the same title directed by E.W. Emo.
A newspaper delivery man pretends to be a six day bicycle racer in order to impress a woman. Having hung around the stadium in order to make his boast convincing, a series of confusions lead to him taking the place of a real rider. Despite his lack of professional training, he manages to win the race "by a nose".