Have a look at this adjustable printable clock face template generator.
https://www.blocklayer.com/clock-face.aspx
You can make a template up to 900 mm diameter, and print it over multiple A4 pages (explained on site), or have officeworks print it on a single sheet for ~ $5
Change the number font, size, colour and position (50 + fonts available) and you can also add images and text, or an image as a background.
Click the' Show Hands' checkbox to add moving hands to the template to see how it will look for real.
If you think anything else should be added to it (the generator) please let me know.