COUNT · 3 LINES
Haiku
Three short lines, most often five, seven and five syllables: 17 in all, and usually no rhyme.
See the patternA POCKET GUIDE TO POEM SHAPES
Three lines, five lines or fourteen. The frame comes first.
A haiku counts syllables. A limerick runs on rhyme and rhythm. A sonnet builds an argument in fourteen lines. Knowing the shape makes poems easier to read, and much easier to write. Here is how three famous forms work, in plain English.
Plain English, with the sources linked.

5 · 7 · 5 count it out
THREE SHAPES TO KNOW
Learn the rule and the poem
starts to write itself.
COUNT · 3 LINES
Three short lines, most often five, seven and five syllables: 17 in all, and usually no rhyme.
See the patternRHYME · 5 LINES
Five comic lines that rhyme aabba, with a bouncing beat. Edward Lear made the form famous in 1846.
Meet Mr LearBUILD · 14 LINES
Three four-line quatrains and a closing couplet: room to set up an idea, turn it, and land it.
Shakespeare's 154A QUICK SHAPE CHECK
Pick a form to see its frame: how many lines, which syllables or rhymes, and a public-domain example of how it begins.
Poets bend these rules all the time. Treat them as a starting frame, not a test.
TWO NUMBERS WORTH KNOWING
Short forms travel well:
in print, and on the Tube.
154 sonnets
Sonnets in the first edition
Shakespeare's collection of 154 poems in the English sonnet form was first published in 1609. On 20 May that year, the publisher Thomas Thorpe entered the book at Stationers' Hall in London.
SHAKESPEARE · 1609
200+ poems
Poems on the Tube, collected
Poems on the Underground launched in 1986, the idea of the writer Judith Chernaik. The 2015 Penguin anthology gathers over 200 poems that have been displayed on Tube trains.
LONDON UNDERGROUND · 1986
A short, shaped poem fits on a single page, or on a single panel above a train seat, which is part of why these forms keep finding new readers.
WRITE ONE TONIGHT
Choose haiku, limerick or sonnet before you choose a subject. The frame tells you how much room you have.
For a haiku, tap out each syllable as you say the line aloud. Five, then seven, then five.
Jot aabba or abab cdcd efef gg in the margin, then fill each line. Rhyming words are easier to find in pairs.
Your ear catches a stumbling beat faster than your eye. Swap a word, read it again, and stop when it sounds right.

POEM FACTS

The English sonnet has fourteen lines, usually in iambic pentameter, organised into three quatrains and a couplet rhyming abab cdcd efef gg.
The hokku, the ancestor of the haiku, served to begin a longer linked poem by establishing a season. In English, haiku are most often three unrhymed lines of 5, 7 and 5 syllables.
Edward Lear's A Book of Nonsense, a collection of limericks, was first published in 1846. The form is five humorous lines rhyming aabba, typically with an anapestic beat.
Shakespeare's Sonnets appeared in 1609, printed by G. Eld and entered at Stationers' Hall by Thomas Thorpe on 20 May that year.
William Sieghart founded National Poetry Day in 1994. The Forward Arts Foundation, which runs it, awarded the first Forward Prizes for Poetry in 1992.
QUICK QUESTIONS
Short answers to the questions people ask most.
Length, rhyme and tone. A sonnet is a fixed form of lyric poetry in fourteen lines, usually iambic pentameter; the English sonnet runs as three quatrains and a couplet rhyming abab cdcd efef gg. A limerick is short, humorous and often nonsensical verse in five lines rhyming aabba, with an anapestic beat: two stresses in the shorter third and fourth lines, three in the others.
Fourteen. The English, or Shakespearean, sonnet is organised into three four-line quatrains and a closing couplet, usually rhyming abab cdcd efef gg and usually written in iambic pentameter.
In English, a haiku is most often three unrhymed lines of five, seven and five syllables, 17 in total. That is the usual pattern rather than an unbreakable law, so treat it as a helpful frame.
A limerick has five lines rhyming aabba: the first, second and fifth lines rhyme, and the shorter third and fourth lines rhyme with each other. It typically uses a bouncing anapestic beat.
Edward Lear. His collection of limericks, A Book of Nonsense, was first published in 1846 and helped make the five-line comic verse a household form.
William Sieghart founded National Poetry Day in 1994. The charity behind it, the Forward Arts Foundation, had awarded the first Forward Prizes for Poetry two years earlier, in 1992.
Sources
A NAME THAT SCANS
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