I think something more linear than square and idally the same width as the head board. I aslo think those buitlins [painted to amtch thewalls woulf be good and then I always like drspes in bedrooms so choose either thewall color or a color from the rug for drapes and then maybe 2 pillows the color you choose for the drapes.Go to Art.com and look at giant art prints or check out places that do wall murals .Love the rug BTW

Something (could be 2-4 pieces) at least 2/3rds of the width of the bed, no wider. Fill 1/2 to 2/3rds of the vertical space.

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You could look at adding one long rectangular piece or perhaps three small pieces of artwork above your headboard. Here is what we did for a clients bedroom.

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