The numbers do not refer to power ratings in Watts. The numbers refer to the spacing (in inches) between the lead holes in the pads centres.

Widely used unit for electronics component footprint is in imperial, not metric, as the actual manufactured component dimensions is in imperial unit and converting it to metric always resulting rounding error. Maybe EasyEDA just stick to 'standard/true' imperial unit for all the footprint. Anyway, axial-xx mean the xx is the pad spacing in inch.

@adamalfath Thanks for your comment, I understand that, but JLCPCB in China, and as I know; the Chinese units system is metric, not imperial, and using mm/cm instead of Inch, but anyway, I think it's better to use the electronics units such as Watt for Resistor in the library...

@mohammadbgp, "...I think it's better to use the electronics units such as Watt for Resistor in the library..." I disagree. PCB Footprints are all about dimensions. Power ratings and other parameters are attributes of the Schematic Symbol.

Which Pad Size should be used for 250W (normal) Resistors? Axial-=.4?

@flotschinator98, That depends on the type of resistor your are using. The physical dimensions and therefore the footprints may be different for example for carbon resistors compared to metal film or wirewound. If you look at 250mW rated axial (i.e. leaded or through-hole) resistors you can then choose the type that suits your application. From there you then look up the recommended PCB footprint in the datasheet for that particular type and choose the nearest one that gives enough space for the lead bend radius (bending the leads too close to the case may crack the case or cause overheating duirng soldering). However... If you select the part from the LCSC library, when you place it in the schematic and do **Convert to PCB...** or **Update PCB...**, the correct footprint will be pulled into the PCB for you.