Girth may refer to:
;Mathematics
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Girth (functional analysis), the length of the shortest centrally symmetric simple closed curve on the unit sphere of a Banach space
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Girth (geometry)
In three-dimensional geometry, the girth of a geometric object, in a certain direction, is the perimeter of its parallel projection in that direction... For instance, the girth of a unit cube in a direction parallel to one of the three coordinate a ...
, the perimeter of a parallel projection of a shape
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Girth (graph theory)
In graph theory, the girth of an undirected graph is the length of a shortest cycle contained in the graph. If the graph does not contain any cycles (that is, it is a forest), its girth is defined to be infinity.
For example, a 4-cycle (square) ha ...
, the length of a shortest cycle contained in a graph
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Matroid girth
In matroid theory, a mathematical discipline, the girth of a matroid is the size of its smallest circuit or dependent set. The cogirth of a matroid is the girth of its dual matroid. Matroid girth generalizes the notion of the shortest cycle in a gr ...
, the size of the smallest circuit in a matroid
;Music and entertainment
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''Girth'' (album), 1997 album by heavy metal band Winters Bane
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Girth (Pushing Daisies), an episode of the TV show ''Pushing Daisies''
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Girth (song), the former name of the Guns N' Roses song "Coma"
;Other
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Girth (tack)
A girth, sometimes called a cinch ( Western riding), is a piece of equipment used to keep the saddle in place on a horse or other animal. It passes under the barrel of the equine, usually attached to the saddle on both sides by two or three leath ...
, a piece of equipment used to keep a saddle in place on a horse
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