Updated
Ads & SEO
Ad Unit Size Guide
Browse standard ad sizes, filter by placement and device, and check if a unit fits your content column. Export a clean size list to CSV for faster template building.
Ad Unit Size Library + Fit Checker
Filter common display ad sizes, compare them against your layout width, and export a reusable reference list.
Use the filters, then click “Apply Filters” to see a curated list of common ad sizes and where they typically fit.
Tip: For a clean site-wide system, start with a small “core set” (mobile banner + rectangle + leaderboard + one sidebar size) and expand only after testing.
Enter your viewport and content width, pick an ad unit, and run a fit check to avoid overflow and layout shifts.
Tip: “Fits column” is the minimum requirement. For the best reading experience, leave breathing room around units and avoid tight stacking near headings.
Placement Tips That Keep Layouts Clean
- Design around your content column: measure real widths at breakpoints (mobile, tablet, desktop) and pick units that never overflow.
- Use a core set: fewer sizes can increase consistency and reduce layout bugs. Expand only if your tests justify it.
- Prefer responsive when widths vary: responsive units reduce overflow risk when your content column changes between templates.
- Keep spacing consistent: aim for predictable spacing so ads feel like part of the layout, not interruptions.
- Don’t crowd key content blocks: avoid placing ads immediately next to tables, images, and major headings.
- Mobile needs restraint: what feels “normal” on desktop can feel dense on mobile—optimize for reading first.
- Watch viewability, not just count: a single high-viewability placement can outperform multiple low-viewability placements.
| Goal | What to try | What to avoid |
|---|---|---|
| Prevent overflow | Match unit width to container width, prefer responsive on variable layouts | Forcing 728×90 into a narrow column |
| Improve readability | Use fewer, better-spaced placements | Ads between every short paragraph |
| Increase viewability | Place units where users naturally pause and scroll past | Hidden or below-the-fold-only inventory |
| Reduce layout shift | Reserve space, avoid late-loading that pushes content | Units that expand unpredictably without reserved space |
| Standardize templates | Document a core set with breakpoints | Dozens of unique sizes across pages |
What if your theme changes? Re-check real container widths after redesigns. A layout tweak can turn a “safe” size into an overflow bug overnight.
Export Size List
Export your filtered size list to CSV so you can document your ad system, share it with editors/devs, or standardize templates across categories.
Apply filters in the Size Library tab to generate a CSV export.