1. Common HP Printer Paper Sizes Explained

HP printers support a wide range of paper sizes. Knowing which one you need prevents most paper size errors before they happen. Here’s a quick reference:

💡 Pro Tip: A4 and Letter look similar, but if your printer is set to A4 and you load Letter paper, you’ll get a paper mismatch error or cut-off content. Need help configuring your specific model? See our HP Printer Setup Guide.

2. How to Change Paper Size on Windows 10 & 11

There are two ways to change the paper size in Windows: per-print-job, or as a permanent default.

Method A: Change Per Print Job

1. Open your document and press Ctrl + P to open the Print dialog.
2. Make sure your HP printer is selected in the dropdown.
3. Click “More Settings” or “Printer Properties”.
4. Navigate to the Paper/Quality tab.
5. Under Media or Paper Size, choose your desired size (e.g., Letter or A4).
6. Click OK then Print.

Method B: Change the Default Permanently

1. Open Windows Settings (Win + I).
2. Go to Bluetooth & devices → Printers & scanners.
3. Click your HP printer → select Printing preferences.
4. On the Paper/Quality or Layout tab, set your default paper size.
5. Click Apply → OK.

3. How to Change Paper Size on Mac

macOS handles paper size settings slightly differently from Windows. Here’s how:

Per Print Job (Mac)

1. Open your document and go to File → Print (Cmd + P).
2. Click the “Paper Size” dropdown near the top of the dialog.
3. Select your desired size (e.g., US Letter, A4, Legal).
4. Adjust any other settings, then click Print.

Set Default Paper Size (Mac)

1. Go to Apple Menu → System Settings (or System Preferences).
2. Click Printers & Scanners.
3. Select your HP printer, then click “Options & Supplies”.
4. Under the General tab, find Default Paper Size and update it.
5. Click OK to save.

Having trouble installing your HP on Mac? Check our HP Printer Mac Setup Guide for a full walkthrough.

4. How to Change Paper Size in the HP Smart App

The HP Smart app is available on Windows, Mac, iOS, and Android. It gives you control over paper size from a single interface:

1. Open the HP Smart app on your device.
2. Click or tap Print (or choose a document/photo to print).
3. In the print preview, tap or click the gear icon ⚙ or “More Settings”.
4. Find the Paper Size or Media option and select the correct size.
5. Confirm settings and tap Print.

For wireless setup or HP Smart app connectivity issues, see our HP Wireless Printer Setup Guide.

5. How to Set a Custom Paper Size on an HP Printer

Need to print on labels, envelopes, or non-standard paper? HP drivers support custom sizes:

Windows – Custom Paper Size

1. Open Printing Preferences for your HP printer (via Settings → Printers).
2. Go to the Paper/Quality tab.
3. Click the Paper Size dropdown and scroll to find “Custom” or “More…”
4. Click “New…” or “Custom Paper Size” and enter your width and height.
5. Give the size a name and click Save.
6. Select it from the paper size list and click OK.

According to HP’s official support documentation, custom paper size support varies by printer model and driver version. Always use the latest driver for the best results.

6. Fix “Paper Mismatch” Error on HP Printers

The paper mismatch error occurs when the paper in the tray doesn’t match the paper size selected in the print driver. Here’s how to resolve it:

Still stuck? Our team can remotely diagnose paper feed and size errors. Read more on our HP Printer Troubleshooting page. You can also check HP’s official product specs to confirm your printer’s supported paper sizes.

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Frequently Asked Questions

Final Thoughts

HP printer paper size settings are one of the most common — and most fixable — printer issues. Whether you’re on Windows, Mac, or using the HP Smart app, the solution is almost always a matter of aligning your driver setting with the paper in your tray. Use this guide as your go-to reference, bookmark it, and share it with your office colleagues who face the same headaches.

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