Font size on invoice/ delivery

see the faq:

How can I use a custom CSS file for the printing page without copying and editing the template files?

Copy the style.css (and no other file) from the /wp-content/plugins/woocommerce-delivery-notes/templates/print folder and paste it inside your /wp-content/themes/your-theme-name/woocommerce/print folder (if not there just create it). You can modify CSS to fit your own needs.

Note: There is automatically a class assigned to the html tag that helps you to target the template-type in your CSS.

May be some nice person will please let know to ignorant people as myself where font size can be edit in th file /wp-content/themes/your-theme-name/woocommerce/print/style.css ?

Thank you in advance
Ugo

I’m also confused about how to use custom css styles. I try to debug that for some hours now, but I don’t get it.
I did everything as told in FAQ, copied style.css to mytheme/woocommerce/print, changed some style, but no effect.
According to firebug the correct stylesheet is loading, but it doesn’t show me the altered styles. It’s like someone is lying, either firebug or the stylesheet.
If I put “!important” behind the altered style-information, the changes are visible.
What I really don’t understand is, that, without !important, I can’t see my style in the loaded stylesheet. Normally I would see some overwrites in firebug, but there is nothing but the original style. It shows me the correct line number in that css file, but ignores my altered styles…
Any idea?

Upps, my mistake. I downloaded an old version of your plugin. After updating to the recent version all my custom styles are working fine.

@kruisko yeah the answer is for the old version. good you found a solution.