R.I. Gen. Laws § 21-18-6
The standard barrel for apples shall be of the following dimensions when measured without distention of its parts: length of stave, twenty-eight and one-half inches (28 1/2"); diameter of heads, seventeen and one-eighth inches (17 1/8"); distance between heads, twenty-six inches (26"); circumference of bulge, sixty-four inches (64"), outside measurements; and the thickness of staves not greater than four-tenths of an inch (4/10"); provided that any barrel of a different form having a capacity of seven thousand fifty-six cubic inches (7,056 cu. in.) shall be a standard barrel. The standard bushel box or standard bushel basket for apples shall be a container having a capacity of not less than one United States standard bushel or two thousand one hundred fifty and forty-two one-hundredths cubic inches (2,150.42 cu. in.). Containers for apples other than the standard barrel or bushel shall be marked in terms of cubical capacity or count.
R.I. Gen. Laws § 21-18-6