Numbers

It depends on the technical specifications available for the printer model you want to use. And they would all differ depending on the printer - you can find those on the manufacturer's page.

well, there are two hurdles: one are the app options and the other one is the printer itself - you have to look at their tech specs as to what sizes they support. I would guess that your average home printer only does regular sizes. You'd need an app where youc an set custom sizes - probably export your Numbers document into it. But, then you still cannot necessarily print in that size.

On machine I get the following choices after going to File > Print... in the Numbers app:

I don't see a way to set a custom paper size.

SG