Loom weight (Accepted)
A loom weight is part of a vertical warp-weighted loom: the warp threads are tied to loom weights to maintain tension during weaving. The weights were most often of clay or terra cotta, standardized in size. Though period artifacts, loom weights as such are not found in medieval heraldry. The illustration is based on artifacts found in Suffolk, dating from the 7th Century [Marta Hoffman, The Warp-Weighted Loom, 1964, p.313]. Note that, in Society armory, the loom weight should be drawn with a bit of yarn attached: without the yarn, it may be unidentifiable as a loom weight. See also annulet.
Barbara atte Dragon bears as a badge: A loom weight pendant from a hank of yarn argent.