- Printers
- Inkjet printer
paper-size-mismatch
Brother Paper Size Mismatch on inkjet printer: tray setting
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
Paper Size Mismatch on your Brother inkjet means the paper size setting is not the size of paper in the tray, or the paper guides are not at their marks. Set the right size on the display and in the driver, then reposition the guides.
Safety first
Stop and check this first
- Changing only the printer setting is not enough when you print from a computer: the driver size must also match the paper loaded.
- Do not leave the tray half inserted: push it slowly all the way in and, if something stops it, pull it out and remove the paper or object first.
Safe checks you can perform
- Compare the display setting with the paper
- Reload the paper with the guides set correctly
- Check the size in the driver or application
Leave these tasks to a qualified professional
- Do not attempt this professional task: Brother support when everything matches
- Do not attempt this professional task: Tray inspection at a Brother authorised service centre
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Brother support when everything matches
What they doWhen display, guides and driver already share the same size and the warning will not clear, contact Brother customer support for your model.
They must show youwhich settings were checked and a test print on the size you use.
In writingthe findings, any tray part swapped and the reason, whether warranty applies and the case reference.
Tray inspection at a Brother authorised service centre
What they doIf the tray will not seat properly or the machine fails to detect it with no debris inside, a Brother authorised service centre can inspect the tray and its housing.
They must show youthe tray inspected, any part removed and a paper feed test.
In writingparts replaced and the reason, warranty status and the case number.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Compare the display setting with the paper
- Who:
- you.
- How:
- on the printer panel, check the paper size set for the tray and compare it with the sheets you loaded; change it in the paper settings if they differ.
- Result that matters:
- the size on the display and the paper size are the same.
- If they differed and the warning clears once corrected:
- the tray setting was wrong.
- If they already matched:
- move on to the guides and the paper orientation.
- Evidence to keep:
- photo of the size setting and of the paper pack used.
Evidence: Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages · Brother DCP-J1100DW and MFC-J1300DW FAQ - Paper Size Mismatch
Reload the paper with the guides set correctly
- Who:
- you.
- How:
- pull the tray out, load the paper in the correct orientation and slide the guides to the indicators for your size; push the tray slowly and completely back into the machine.
- Result that matters:
- paper oriented correctly and guides resting on their marks.
- If after reloading you follow the display instructions and the job resumes.
- If Paper Tray not detected appears:
- the tray is not fully in, or paper or an object is blocking it.
- Evidence to keep:
- photo of the tray with the guides in place.
Evidence: Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages · Brother DCP-J1100DW and MFC-J1300DW FAQ - Paper Size Mismatch
Check the size in the driver or application
- Who:
- you, on the computer.
- How:
- open the Brother driver's printing preferences and the application's print dialog and confirm the paper size selected is the size loaded in the tray.
- Result that matters:
- computer, printer and tray all set to the same size.
- If the driver had another size:
- correct it and send the job again.
- If everything matches and the warning persists:
- note the model and message for Brother support.
- Evidence to keep:
- screenshot of the size chosen in the driver.
Evidence: Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages · Brother DCP-J1100DW and MFC-J1300DW FAQ - Paper Size Mismatch
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Printers
- Brand
- Brother
- Product type
- Inkjet printer
Known code variants
- Brother DCP-J1100DW Paper Size Mismatch
- Brother DCP-J1100DW tamaño de papel
- Brother inkjet wrong paper size in tray
- Brother MFC-J1300DW papel no coincide
- Brother MFC-J1300DW Paper Size Mismatch
- Brother MFC-J890DW tamaño papel bandeja
- Brother MFC-J895DW paper size error
- Brother Paper Size Mismatch
- Brother Paper Size Mismatch Tray 1
- Brother Tam. pap. no coinc.
- Brother Tamaño de papel no coincide
- impresora Brother tinta tamaño papel incorrecto
What it means
The Brother FAQ for the DCP-J1100DW, MFC-J1300DW, MFC-J890DW and MFC-J895DW says this message appears when the paper size setting does not match the paper loaded in the tray, or when the tray guides are not set to the indicators for that size. It is a settings warning rather than a fault: it does not mean the tray or a sensor is broken. When you print from a computer, the driver's size matters as well. Other Brother models may word it differently, for example with Tray 1 or Tray 2 added.
Warnings and stop conditions
- Lowsource verified
Changing only the printer setting is not enough when you print from a computer: the driver size must also match the paper loaded.
Evidence: Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages · Brother DCP-J1100DW and MFC-J1300DW FAQ - Paper Size Mismatch
- Lowsource verified
Do not leave the tray half inserted: push it slowly all the way in and, if something stops it, pull it out and remove the paper or object first.
Evidence: Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages
Symptoms and causes
Probable causes · in order
- Size setting differs from the paper loadedCommon
The paper size chosen on the printer's display for the tray does not match the sheets inside it, for example A4 set while smaller paper is loaded.
Evidence: Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages · Brother DCP-J1100DW and MFC-J1300DW FAQ - Paper Size Mismatch
- Paper guides not at the marks for that sizeCommon
Brother says the message also appears if you did not slide the tray guides to the indicators for the paper size you are using, or loaded it in the wrong orientation.
Evidence: Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages · Brother DCP-J1100DW and MFC-J1300DW FAQ - Paper Size Mismatch
- Driver size differs from the trayPossible
When printing from a computer, a driver set to a size other than the paper loaded makes the printer detect the mismatch and stop.
Evidence: Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages · Brother DCP-J1100DW and MFC-J1300DW FAQ - Paper Size Mismatch
Virtual technician
Does paper-size-mismatch still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Brother DCP-J1100DW and MFC-J1300DW Online User's Guide - Error and Maintenance Messages
Brother Industries, Ltd. · official_doc
- 2
Brother DCP-J1100DW and MFC-J1300DW FAQ - Paper Size Mismatch
Brother Support · 2017 · official_doc
- 3
Brother DCP-J1100DW y MFC-J1300DW FAQ - Tamaño de papel no coincide
Brother Support · 2017 · official_doc
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