A Single Form made in holly wood in 1937 (BH 102) has been held by the Leeds Art Gallery since 1990.
In 1937–38, Hepworth made a tall columnar sculpture like a modern totem pole for an exhibition in Paris.
Inspired by her earlier work, Hepworth cast a bronze edition of Single Form in Lignum Vitae (BH 92) in 1962.
The following year, she cast the 1937-38 plaster Single Form in bronze in 1963, in series of 7+1 (seven plus an artist's copy), at the Morris Singer foundry.
The column broadens from the base, rising with a broadly triangular but smoothly rounded cross-section, widest at about two-thirds of its length, before narrowing to a truncated top.