B2 size, 500 x 707 mm, 19.7 x 27.8 in. B3 size, 353 x 500 mm, 13.9 x 19.7 in. B4 size, 250 x 353 mm, 9.8 x 13.9 in. B5 size, 176 x 250 mm, 6.9 x 9.8 in.
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