In heraldry, a small horizontal stripe or band on a shield, narrower than a fess or regular bar.
From French 'barru' (striped) plus '-let' suffix indicating something small. Barrulets are the diminutive form of heraldic bars, used in coat-of-arms designs since medieval times.
The '-let' suffix (as in booklet, ringlet, starlet) was heraldry's way of saying 'smaller version'—it preserves the medieval passion for exact hierarchies and size-classifications in every visual system!
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