Tetrameter (seven-syllabled).
"As it fell upon a day
In the merry month of May."
—Shakespeare.
Pentameter (ten-syllabled, "Pope's decasyllable").
"Truth from his lips prevail'd with double sway,
And fools who came to scoff remained to pray."
—Goldsmith, Deserted Village.
Hexameter (twelve-syllabled).
"Doth beat the brooks and ponds for sweet refreshing soil: