Ghazals are Arabic, Persian, Urdu, or Hindi style poems, made up of couplets traditionally in 5, 7, 10 or 15 couplets forms. Although these poems have traditional forms, they have no limit and can be much lengthier.
Example: Traditional 7 couplet form by Frank G. Poe, Jr.
My eight year old son climbing
Sassafras tree, both little saplings
Reaching the top, boy did he scream,
How high from the ground it did seem,
Running to help him, we had to laugh,
Seeing the poor little tree nearly bent in half,
Son’s feet dangling three inches off ground,
Fighting chuckles to say, “Son, just look down.”
Prying open his eyes, looking down, he let go,
We’ll never let him live it down, don’t you know.
Parents catch these little moments in time,
We tuck them away in the back of our minds.
To your dates, friends and relatives the story will gush,
About the poor little sassafras tree, until you blush.