Poetic Structure- How Many Lines Do Sonnets Have?

The Short Answer: 14 Lines

A sonnet is a 14-line poem. That's the defining characteristic. Every sonnet, regardless of type or era, sticks to this rule. No exceptions, no loopholes.

But here's what gets complicated: how those 14 lines are arranged varies significantly between different sonnet traditions. The structure, meter, and rhyme scheme differ depending on which type you're working with.

The Main Types of Sonnets

Three major sonnet traditions dominate English poetry. Each organizes those 14 lines differently.

Shakespearean (English) Sonnet

The most recognizable form in English literature. Shakespeare used it to write some of the most quoted poems in the language.

Structure breaks down like this:

• 3 quatrains (four-line stanzas)
• 1 couplet (two-line stanza)
• Iambic pentameter throughout
• Rhyme scheme: ABAB CDCD EFEF GG

The couplet at the end typically delivers a twist or a punchline. Shakespeare was a master of this—setting up an idea over 12 lines, then detonating it in the final two.

Petrarchan (Italian) Sonnet

The original sonnet form. Petrarch wrote hundreds of these in the 14th century, and they became the template for everything that followed.

Structure:

• Octave (eight lines) + Sestet (six lines)
• Iambic pentameter
• Rhyme scheme: ABBAABBA for the octave, then CDECDE, CDCDCD, or CDEDCE for the sestet

The octave presents a problem or situation. The sestet responds to it. This call-and-response structure gives Petrarchan sonnets a conversational feel, even in formal verse.

Spenserian Sonnet

Edmund Spenser's innovation. He took Shakespeare's structure but linked the quatrains through a continuous rhyme scheme.

Structure:

• 3 quatrains + 1 couplet
• Iambic pentameter
• Rhyme scheme: ABAB BCBC CDCD EE

Each quatrain rhymes into the next. The chains make the poem feel more interconnected, less episodic than the Shakespearean form.

Sonnet Types Comparison

The Meter Question

Almost all sonnets use iambic pentameter. That's five iambic feet per line (da-DUM da-DUM da-DUM da-DUM da-DUM).

English sonnets almost always stick to this. Italian sonnets do too, when translated into English. The meter creates a heartbeat rhythm that makes the poems satisfying to read aloud.

But here's the thing: Shakespeare didn't follow the rules perfectly. Neither did Petrarch. They bent the meter for emphasis, for wordplay, for effect. That's fine. The form exists to be worked with, not against—but you need to know the rules before you break them.

Getting Started: Writing Your First Sonnet

Pick your form. Shakespearean is usually the easiest starting point because the rhyme scheme is predictable.

Step 1: Choose your end words. You need rhymes for ABAB CDCD EFEF GG. Pick four rhyme pairs. Write them down.

Step 2: Start with quatrain one. Introduce a situation, image, or idea. End with your A rhyme.

Step 3: Quatrain two. Build on the first. Shift slightly. End with your B rhyme.

Step 4: Quatrain three. Complicate things. This is where tension builds. End with your F rhyme.

Step 5: The couplet. Resolve or subvert. Your G rhymes land here. Make them count.

Example opening line (in iambic pentameter):

"Shall I compare thee to a summer's day?"

Count it: shall-I / com-PARE / thee-TO / a-SUM / mer's-DAY. Five feet. That's your baseline.

Why Sonnets Still Get Written

The 14-line constraint is the point. Limitations force creativity. When you only have so many syllables, every word matters. Every rhyme has to earn its place.

Poets still write sonnets because the form works. It's been tested by centuries of writers. Shakespeare, Petrarch, Spenser, Milton, Wordsworth, Keats, Frost—they all used it. That's not tradition for tradition's sake. It's writers returning to a structure that actually holds up under pressure.

You don't need to write a "good" sonnet on your first try. You need to write a sonnet. Then another. The form teaches itself through practice.