See also: Thimble in Pictorial Dictionary of Heraldry.
A seamstress’s implement to protect a fingertip while sewing.
Default orientation: palewise, opening to base. No proper coloration.
Thimble (1) §
Source: Pennsic Traceable Art. Artist unknown.
Thimble (2) §
Adapted from photographs of a 15th century English thimble, UKDFD 169.