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So here is the BICEP2 picture:

enter image description here

How big is that? How much of the sky?

Say, compared to this picture of the CMB by Planck:

enter image description here

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    $\begingroup$ While this is certainly a good thing to want to know: did you notice the degree markings on the axes of the plot? Any reason you couldn't just compute the angular area from those? $\endgroup$ – David Z Mar 18 '14 at 17:34
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The BICEP2 pre-print article says "effective area of 380 square degrees", which is less than the value you would obtain by just multiplying the sides of the rectangle in the plot above, since these are spherical coordinates. Also, in the article more-full versions of the plot above are shown; that above is a truncated version. http://bicepkeck.org/b2_respap_arxiv_v1.pdf

Planck is the full sky, about 41000 square degrees.

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