... well I have made my own and thought I would share it with you how I did it ...
a frame, a clip frame of the same size, an old postcard or picture, some glue spots, graph paper, a few tacks/panel pins, a hammer and a screw driver.
take the glass from both frames and clean them. I had to trim the glass from the clip frame as it was a tiny bit too big.
stick the glue spots on the back of the postcard ... I ended up using 3 so it didn't move at all.
put the other sheet of glass in front and place in the frame ... double check there are no fingerprints or bits of dust between the sheets of glass.
I am really pleased with mine and can't wait for my bathroom to be painted to I can hang it :)
I would love to see any you make so please leave a link in the comments below!