Frame with the same surface area as the A4 area it surrounds
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This reminded me of something I once read in Graham Hancock's Fingerprints Of The Gods. In researching the Great Pyramid he discovered that the volume of Khafu's grnite sarcophagus (the only thing left in the Great Pyramid's King's Chamber) was exactly double that of the volume that was cut out of the middle to house the coffin. Make sense? The internal volume was half of the external volume. Anyways, I thought you may find it interesting that they had the same obsessive, playful and artistic nature 4500 years ago!