Brother Size Error DX: Paper size not usable for 2-sided printing
Also shows as: Size Error 2-sided
✅ Usually fixable yourself
Brother says the paper in the tray is not the correct size and is not available for automatic 2-sided printing.
What to try
- Press and hold Go for about two seconds if needed.
- Load a supported size (Letter, Legal, Mexico Legal, India Legal or Folio in the US) and set the tray for that size.
- Choose a paper size that supports 2-sided printing and print again.
When it needs a technician
Brother lists no service step for this message.
Which models show Size Error DX
Brother documents this code for models including HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L5210DW, HL-L6210DW, MFC-L8900CDW.
First steps for any printer error
- Write down the exact code before you do anything else — similar-looking codes often mean completely different things.
- Power the printer off, unplug it for a couple of minutes, then power it back on. A surprising number of transient errors clear here.
- Open the covers and check for paper scraps, packaging material, or anything blocking the carriage.
- Check the cartridges or tanks are genuine, correctly seated, and not empty.
- Confirm the printer is plugged directly into a wall outlet, not a power strip or extension lead.
- Check your model’s own manual — codes are model-specific, and the manual is the authority for your machine.
Source: Brother Support FAQ - Size Error DX or Size Error 2-sided (HL-L2350DW). Codes are model-specific, so your own model's manual is the final word. Reviewed October 2026.
Still showing Size Error DX?
Tell our printer technician your model and what you've tried. You'll find out whether it's fixable at home or worth repairing at all.
Ask about my printer — $1Eric Paul Amora · Printer & Hardware Repair Technician
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