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The Traditional British paper standards were very common until Britain adopted the ISO paper standards. Still used on some occasions, the Traditional British standard is now all but obsolete.

Format Width x Height (mm) Width x Height (inches)
Dukes 140 x 178 mm 5.5 x 7 inches
Foolscap 203 x 330 mm 8 x 13 inches
Imperial 178 x 229 mm 7 x 9 inches
Kings 165 x 203 mm 6.5 x 8 inches
Quarto 203 x 254 mm 8 x 10 inches