I don't really like black frames either but I wanted to separate them so they were all individual drawings in their own space and I don't like coloured frames unless in extreme circumstances.
It's okay, I had an adult help me with the cutting after I used sticky-back plastic to heal up my wounds from my wanton use of my Crayola safety scissors.
I got an A5 sketchbook and cut it up so the biggest is half an A5 page.