Contemporary art accustomed to us to dread the body of the artist performer and active as work of art. This artistic body, by its presence or the deployment of actions or simple movements, registers not only the body in the space, but described it and defines it. Body and space call out to one another. How does the artist stand out in the face in front of the incommensurability of the space ? And how this body becomes the place of a privileged experiment of the space for the spectator ? To try to measure it from the scale of its own body appears to be a solution, sometimes absurd, sometimes serious. The four times of this demonstration (body standard, body play, body draws, universal body) present attitudes adopted by a selection of striking artists, from the 70s until now, which launch the challenge of Rendre le monde à sa mesure.