The gutter looks like nothing: a strip of empty space between two boxes. Yet it is where a comic's timing lives. Make it tighter and the reading speeds up; widen it and the story takes a breath. This guide breaks a comic page into its structural parts (panel, border, gutter, and tier), traces how the gutter changed from printed pages to phone screens, and ends with a hands-on tutorial for designing gutters that do more than sit there.
- A tier is a horizontal row of panels; a page is a stack of tiers. Gutters run within a tier (vertical) and between tiers (horizontal).
- The gutter is where readers perform closure, the mental step that connects two panels into one story.
- Printed gutters are usually a few millimetres wide. On vertical-scroll platforms, WEBTOON's creator guidance asks for at least 200 px between panels on an 800 px canvas, a quarter of the canvas width. The full upload spec is in our webtoon canvas size guide.
- Gutter width is a pacing control. Pick one base gutter, then change it deliberately and rarely.
1. Anatomy of a Comic Page
Before changing a gutter, name every part of the page so you know what you are changing. Comics use a small, consistent vocabulary:
| Term | What it is | Design role |
|---|---|---|
| Panel | One framed image: a single moment or span of action. | The basic unit of story time. |
| Border (frame) | The line around a panel. It can be thick, thin, wavy, or absent. | Sets tone; removing it opens the moment up. |
| Gutter | The space between panels. | Controls pacing and the reader's sense of time. |
| Tier | A horizontal row of one or more panels. | Organizes the page into reading lines. |
| Page margin | The empty edge around all panels. | Protects art from trimming and the binding. |
| Splash | One panel that fills (almost) the whole page. | A pause or a reveal. |
In comics, "gutter" means the gap between panels. In book printing, it means the inside margin next to the spine. They are different things, and both matter if you print. For the binding meaning, see our KDP interior guide.
2. What the Gutter Actually Does
Scott McCloud's Understanding Comics (1993) gave the gutter its most influential explanation. Readers look at two separate images and mentally supply what happened in between. McCloud called that act closure, and he argued that comics are largely built on it. The gutter is the physical place where closure happens, so how you size and use it changes what readers fill in.
McCloud also sorted panel-to-panel jumps into six types, which is a practical checklist for deciding how much space a transition needs:
| Transition | What changes between panels | Gutter suggestion |
|---|---|---|
| Moment-to-moment | A tiny slice of time | Tight |
| Action-to-action | One subject, a clear next action | Tight to medium |
| Subject-to-subject | New subject, same scene | Medium |
| Scene-to-scene | Time or place jumps | Wide, or a tier break |
| Aspect-to-aspect | Different views of one mood or place | Medium; consistent |
| Non-sequitur | No logical link | Rare; deliberate |
The gutter suggestions are our practical translation, not McCloud's rules. They give you a defensible starting point: the bigger the mental leap, the more visual room you give the reader to make it.
3. Tier Structure and Reading Path
Tiers do the heavy lifting of guiding the eye. In left-to-right comics, readers follow each tier left to right, then drop to the next, a loose Z-shaped path. Manga reverses the horizontal direction. Three habits keep that path obvious:
- Keep gutters inside a tier narrower than or equal to the gap between tiers. This is a common design convention, not a law. It groups side-by-side panels as one "line" of reading, so the eye does not guess whether to go across or down.
- Align edges. When panel edges line up across tiers, the page reads as a clean grid. When they break, the break is read as emphasis.
- Avoid ambiguous junctions. If a tall panel sits beside two stacked panels, make sure the stacked pair clearly belongs together, or readers may hop to the wrong panel.
Counting tiers also helps with pacing. Our panels-per-page guide covers how many panels fit, and our panel composition guide covers size and placement. For the grid arithmetic behind uneven panels, see comic panel grid geometry. This article is about the space between them.
4. From Printed Margins to Digital Scroll
Printed pages: the gutter is drawn large, then shrunk
Western comic artists traditionally draw on 11 × 17 inch boards with roughly a 10 × 15 inch live area, then see the art reduced for printing. A working artist describing this puts the typical enlargement at about 148% of printed size. The practical consequence is easy to miss: the gutter you draw is not the gutter readers see. A 0.25-inch gutter on the board prints at about 0.17 inches (0.25 ÷ 1.48). If you plan gutters in print size from the start, you avoid the surprise.
Printed pages also have physical limits. Paper is trimmed, so panels need safe margins, and a bound book hides some of the inside edge. Early creators also worked within whatever space a newspaper or magazine allowed. Even so, strips such as Winsor McCay's Little Nemo in Slumberland (from 1905) showed how far panel shapes and sizes could bend to the story when the page allowed it.
Page-based digital: same logic, smaller screen
Digital comics that keep the printed page shape inherit its gutters, but a phone screen shrinks the whole page. A gutter that looks fine on A4 can fuse into a hairline when scaled to a 6-inch display. If you expect readers on phones, widen gutters slightly and thicken borders so panels stay distinct at small sizes.
Vertical scroll: the gutter becomes distance
Vertical-scroll comics, popularized by platforms such as WEBTOON, remove the page. Time is now measured in scrolling. WEBTOON CANVAS creator guidance advises a minimum of 200 px between panels (for an 800 px wide canvas) and recommends varying panel width, shape and size to show importance. In effect, empty space is the pause button: a long blank stretch makes the reader scroll through silence before the next beat.
In print, gutters are small and panel borders define rhythm. In scroll formats, gutters are large and the amount of empty scroll defines rhythm. Same idea, very different numbers.
5. Gutter Sizes: Print, Screen and Scroll
There is no single correct gutter width. Treat these as starting points, then judge by eye on a printed or on-screen test. Printed manga gutters are often tighter than Western ones, in the range of a few millimetres (compare the two traditions in our manga vs. Western template guide). In the BlankComic editor, which measures pages at 72 px per inch, a gutter of roughly 6–9 px works out to about 2–3 mm. Set it once with the panel spacing control and keep it.
This table converts common print gutters into pixels at 300 DPI and as a share of an A4 page width (210 mm):
| Gutter (mm) | Inches | At 300 DPI | % of A4 width |
|---|---|---|---|
| 2 mm | 0.079" | 24 px | 1.0% |
| 3 mm | 0.118" | 35 px | 1.4% |
| 5 mm | 0.197" | 59 px | 2.4% |
| 8 mm | 0.315" | 94 px | 3.8% |
| 12 mm | 0.472" | 142 px | 5.7% |
Compare the last column with WEBTOON's 25% (200 px of 800 px). Scroll comics use gutters an order of magnitude larger than print comics, which is why a layout cannot simply be exported from one format to the other without rethinking its spacing.
6. Tutorial: Designing Dynamic Gutters
A dynamic gutter is one you change on purpose. The idea is simple: pick a base width and let every departure from it carry meaning.
Set a base gutter and keep it everywhere else
Choose one width (for example about 2–3 mm, or 6–9 px in the editor) and use it for ordinary dialogue and action. Consistency is what makes a change readable. Use the panel spacing control and Snap to grid so every gap matches exactly.
Narrow the gutter to speed things up
For a chase, a fight, or a rising argument, shrink the gap between a run of panels. Tighter spacing makes the sequence feel compressed and urgent. Keep the gutter equal across the run so it reads as one burst.
Widen the gutter to slow down
Before a reveal, after a shock, or when time passes, open the gap or add a full tier of white space. The extra room gives closure more work to do, which is exactly what you want for a pause.
Remove the border when a moment should breathe
Select a panel and set its border Thickness to 0 in the panel settings. With no frame, the image bleeds into the surrounding space and the gutter effectively disappears around it. Use this for establishing shots, memories, and quiet beats.
Angle gutters in parallel
A diagonal gutter adds energy, but keep every angled edge parallel to the others. Mixed angles look accidental. Check that the reading order is still obvious.
Print a test page and step back
Print at actual size, or view on a phone, and look from arm's length. If the pacing you intended does not show, the gutter change was too small to notice or too large to ignore.
Change gutter width for a reason you can name: speed, pause, time jump, or emphasis.
Vary every gutter on the page. If everything is dynamic, nothing is.
Keep panel borders at a visible weight (at least 0.75 pt for print) so thin gutters stay legible.
Shrink gutters below what your printer or screen can resolve; panels will appear to touch.
Build your base layout, then use the panel spacing control and Snap to grid to set identical gutters. Duplicate the page from the Pages panel once you have a template you like. Try the same story beat with a tight gutter and a wide one, and compare how each feels.
Frequently Asked Questions
What is a gutter in comics?
The gutter is the space between comic panels. Readers use it to connect one panel to the next in their mind, a process Scott McCloud calls closure. Its width affects pacing: narrow gutters feel fast, wide gutters feel slow.
What is a tier in a comic book?
A tier is a horizontal row of panels. A page is made of stacked tiers, and readers move through each tier before dropping to the next one. Gutters run vertically inside a tier and horizontally between tiers.
How wide should a comic gutter be?
There is no fixed rule. Printed comics commonly use gutters of a few millimetres, and manga tends to be tighter than Western comics. In the BlankComic editor, 8–12 px at the default scale (about 2–3 mm on A4) looks clean. Vertical-scroll formats use far larger gaps.
Why do webtoons have such large gaps between panels?
In vertical scroll, empty space controls pacing. WEBTOON's creator guidance suggests at least 200 px between panels on an 800 px canvas, so readers scroll through a pause before the next beat.
What is the difference between a gutter and a margin?
In a comic layout, the gutter is the gap between panels, while the margin is the empty border around the whole set of panels. In book printing, the 'gutter margin' is the inside margin next to the spine, which is a separate concept.