Ells

Rapunzel had magnificent long hair, fine as spun gold, and when she heard the voice of the enchantress she unfastened her braided tresses, wound them round one of the hooks of the window above, and then the hair fell twenty ells down, and the enchantress climbed up by it.

These names […] may form regular plurals; thus, Aes, Bees, Cees, Dees, Ees, Effs, Gees, Aitches, Ies, Jays, Kays, Ells, Ems, Ens, Oes, Pees, Kues, Ars, Esses, Tees, Ues, Vees, Double-ues, Exes, Wies, Zees.