I have designed my first QSL card but I'm worried that I may have reserved too little space for the call of the remote station. I'm worried that the buro might have trouble with it. However, I see many QSL cards on this examples page with a fairly small field as well. My card currently looks like this:
(I prefer to not put the picture online so that it's a surprise when you get it).
I would write the remote call under 'CALL' in letters of about 3.5mm high.
Would the buro be happy with this?