How to Fix “Paper Size Mismatch” on a Printer – Easy Step-by-Step Guide
If you’re seeing a “Paper Size Mismatch” message when trying to print, it typically means the selected paper size in your device settings doesn’t match the paper loaded in the printer tray. Here’s a simple guide to help you resolve this issue.
📌 Why Does “Paper Size Mismatch” Occur?
This message usually appears when there’s a difference between:
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The paper size chosen in your print settings
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The actual size of paper loaded in the tray
For example, selecting “Letter” size on your computer but using “A4” in the tray can cause the printer to pause and prompt for action.
🔧 Steps to Correct the Paper Size Mismatch
1. Check and Update Printer Settings
On Windows:
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Go to Control Panel > Devices and Printers
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Right-click your printer and select Printing Preferences
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In the Paper/Quality tab, verify the selected paper size
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Update the setting to match the paper in your tray
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Print a sample page to confirm
On macOS:
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Open System Settings > Printers & Scanners
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Select your printer
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Use the print dialog to adjust the paper size if needed
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Print a test page to ensure alignment
2. Align Paper Correctly in the Tray
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Remove the paper tray and straighten the paper stack
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Adjust side guides to gently fit the paper edges
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Reinsert the tray and try printing again
3. If the Message Still Appears
Sometimes, even with paper loaded, the error can persist due to:
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Curled or bent sheets
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Unsupported paper types
Try replacing the paper with flat, standard sheets recommended for your printer.
4. Clean the Paper Feed Area
Dust or debris may affect paper detection:
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Turn off the printer
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Open the tray or feed area
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Gently wipe with a soft, dry cloth
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Power on and retry printing
✅ Tips to Prevent Future Paper Size Issues
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Always select the correct paper size before printing
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Align paper neatly in the tray and adjust the side guides
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Use clean, undamaged sheets
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Perform routine printer maintenance
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Set a default paper size if you frequently use one format
Note: Still Stuck? It might depend on the specific printer model you're using.
