Seam (unit)

A seam is an obsolete unit of volume or mass in the United Kingdom

The Oxford English Dictionary includes definitions of a seam as:


 * 6 - 8 imppk of sand
 * 9 imppk of apples
 * 8 impbu of grain
 * 120 lb of glass (or 100 lb in the 14th century)
 * a cart-load, sometimes of a specified amount such as 2 -Lcwt of straw or 3 -Lcwt of hay or manure.

Cardarelli asserts that it was equal to 64 impgal.