Your printers/software may report error like label size does not match issue because the printer set up size does not match the actual label size on your printer.
So the solution is change the printing setted size to actual label size.
Please see detailed instruction for Windows User and Mac users and Brother P-Touch user。
For Windows User:
Go to the ‘printer preferences’ -> ‘advanced’ -> ‘paper size’, select the correct size for the printer (please select the 4x6 inch or 100*150mm)
For Mac User:
Note: You can use the presets settings to permanently save these specific printing settings and avoid repeated setup.
Brother P-Touch User (Eg. DK-1209 62mm x 29mm)
Paper’ -> ‘Media Size’
Adobe PDF File Set Up. (Eg. DK-1209 62mm x 29mm)
File’ -> ‘Print’ -> ‘Page Setup’, select the correct size for the printer (Eg. 62mm x 29mm for DK-1209)
If the issue still not fixed, don't hesitate to contact us by email@example.com and our technicial expert will bring more help.