Too wide printing problem is very common on dot com sites.

Problem is USA standard paper size larger than A4 which is commonly in use outside the USA.

To get to print correctly after click on 'print' look for 'properties' button and click on this. you will probably get a number of tabbed pages. On one of these pages you will find that there is a check mark against 'Print actual size'. Click on the check mark for scaling to A4 and you should be OK