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Poster size guide: dimensions, pixels, bleed, and safe area
Short answer
Common poster sizes include 11 x 17, 18 x 24, 24 x 36, and 27 x 40 inches. Trim Proof's supported starter poster profile is 11 x 17 inches. At 300 DPI, an 11 x 17 poster is 3300 x 5100 px after trim. With 0.125 inch bleed on every edge, the full-bleed file is 11.25 x 17.25 inches, or 3375 x 5175 px at 300 DPI. Printer specifications still control the accepted size, bleed, safe area, marks, color workflow, and delivery format.
Use this page when choosing a poster document size before adding bleed, safe-area margins, vector text, color settings, crop marks, and a checked print-ready PDF export.
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What this page covers
- 11 x 17 inch Trim Proof starter poster trim profile
- Common 11 x 17, 18 x 24, 24 x 36, and 27 x 40 inch poster sizes
- 3300 x 5100 px trimmed 11 x 17 poster size at 300 DPI
- 11.25 x 17.25 inch full-bleed file with 0.125 inch bleed
- 3375 x 5175 px full-bleed size at 300 DPI
- 0.5 inch safe margin for important poster text
- Printer-requested crop marks, PDF/X level, color workflow, and delivery format
How to use this guidance
- 1Choose the final trimmed poster size before designing
- 2Confirm whether the printer expects 11 x 17, 18 x 24, 24 x 36, 27 x 40, or another poster format
- 3Use the 11 x 17 starter profile when a checked Trim Proof poster proof is enough for the job
- 4Add 0.125 inch bleed on all sides if artwork reaches the edge
- 5Keep important titles, dates, QR labels, and contact details inside the safe area
- 6Run preflight and compare the proof against the printer's file requirements
Common poster dimensions
There is no single poster size for every job. Common formats include 11 x 17 inches for small posters, 18 x 24 inches for medium posters, 24 x 36 inches for large posters, and 27 x 40 inches for movie-style posters. The printer, frame, venue, or event requirement should decide the final trim size.
11 x 17 poster pixels at 300 DPI
For raster artwork, multiply inches by 300. An 11 x 17 inch poster is 3300 x 5100 px after trim. With 0.125 inch bleed added to every side, the full-bleed document becomes 11.25 x 17.25 inches, or 3375 x 5175 px.
Poster bleed and safe area
Bleed is extra artwork outside the trim edge so small cutting shifts do not leave white slivers. Trim Proof's current poster profile uses 0.125 inch bleed and a 0.5 inch safe margin around an 11 x 17 inch trim. Important poster titles, dates, QR labels, sponsor names, and contact details should stay inside the safe area.
Where Trim Proof fits
Trim Proof creates a fresh poster proof from a structured brief, keeps final poster copy in the deterministic PDF layer, applies explicit trim and bleed geometry, and checks the PDF/X export before production download. It does not replace the printer's size chart or guarantee acceptance by every printer.
Related print-ready tools
Poster Maker With AI Print-Ready PDF/XMake poster designs from a brief with an 11 x 17 starter profile, bleed, safe area, vector text, preflight, watermarked free demo art, and paid clean PDF/X export.Free Poster Maker DemoTry a free poster maker demo with watermarked art, 11 x 17 trim, bleed, safe area, vector text, preflight, and paid clean PDF/X export.Poster Template for Print-Ready PDFsCreate a poster template for print-ready PDF proofs with 11 x 17 setup, bleed, safe area, vector text, crop marks, PDF/X, preflight, and paid clean downloads.
Common questions
What is a standard poster size?
Common poster sizes include 11 x 17, 18 x 24, 24 x 36, and 27 x 40 inches. Trim Proof's supported starter poster profile is 11 x 17 inches.
Is 24 x 36 a standard poster size?
Yes, 24 x 36 inches is a common large poster size. Trim Proof's current starter poster profile is 11 x 17 inches, so confirm the printer's required size before production export.
Is 18 x 24 a poster size?
Yes. 18 x 24 inches is a common medium poster size. Trim Proof's current supported starter poster profile is 11 x 17 inches.
What pixel size is an 18 x 24 poster?
At 300 DPI, an 18 x 24 inch poster is 5400 x 7200 px after trim. Trim Proof's 11 x 17 starter poster is 3300 x 5100 px after trim and 3375 x 5175 px with 0.125 inch bleed.
Can Trim Proof guarantee a printer will accept my poster?
No. Trim Proof can create and check a poster proof, but each printer can set its own trim, bleed, crop-mark, color, PDF/X, stock, finishing, and delivery requirements.