Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Broad

Broad as barn doors.
—John Heywood

Broad as Heaven’s expanse.
—Victor Hugo

Broad as the kingdoms and empires of old.
—Charles Mackay

Broad as a furred stomacher.
—Thomas Nash

Broad and general as the casing air.
—William Shakespeare

Broadens like the summer morn.
—Menella B. Smedley

Broader than the sea.
—Old Testament