A4

I, discovered, that:

A4 Proportions

This humble sketch illustrates what I'm talking about: Starting from a square of dimensions a x a, take the diagonal of the sqaure b and draw an arch on one of the diagonals starting points, which obviously its radius is b. Extend one of the sqaure's sides and draw a new side on the point of intersection. This new rectangle will have the proportion of 1 to square root of 2 (which is 1.414~). This rectangle, is the Silver Proportion. Which is the proportion of a good great A4 sheet of paper.

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I respect A4s now!