Positions of the feet in ballet

[1] Two additional positions, known as the sixth and seventh positions, were codified by Serge Lifar in the 1930s while serving as Ballet Master at the Paris Opéra Ballet, though their use is limited to Lifar's choreographies.

[4] The first basic position requires the feet to be flat on the floor and turned out (pointing in opposite directions as a result of rotating the legs at the hips).

In open fourth position the heels are aligned, while in closed fourth position the heel of the front foot is aligned with the toe of the back foot.

In Lifar's sixth position, the legs are turned in with the feet side-by-side and parallel.

[5] Similar to fourth position, but performed en pointe with heels in center with each other.