Sorry if I wasn't being clear. The problem remains the original - okular does not show/offer all printer options. Specifically I am missing paper size. I can set it in the normal place (to e.g. C5 Envelope), but that is ignored and the printer sees "A4 Standard". Topday we managed to print envelopes using okular on an old openSUSE 13.1. I can compare the options offered if that helps.