Draw a larger square around a smaller square. What is an aesthetically pleasing margin?
Fit an octagon exactly between the larger and smaller so that 4 sides of the octagon are coincident with sides of the larger square and the corners of the smaller square are on midpoints of the other 4 sides of the octagon.
The ratio of areas between the larger and smaller squares is then 2:1; or linear dimensions sqrt(2):1.
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