Header Panels Size Orientation Width Height Paper Size A5 Portrait 178 80 148 Landscape 240 80 210 A4 Portrait 240 80 210 Landscape 327 80 297 A3 Portrait 327 80 297 Landscape 450 80 420 A2 Portrait 450 80 420 Landscape 624 130 594 A1 Portrait 624 130 594 Landscape 871 180 841 A0 Portrait 871 180 841 Landscape 1214 180 1189 All dimensions shown in (mm) Portrait Header Panels Landscape Header Panels A5 - H200 - £ 1.30 - Quantity:  A5 - H303 - £ 2.80 - Quantity:  A4 - H201 - £ 2.80 - Quantity:  A4 - H304 - £ 3.55 - Quantity:  A3 - H202 - £ 3.55 - Quantity:  A3 - H305 - £4.85 - Quantity:  A2 - H206 - £ 4.85 - Quantity:  A2 - H308 - £9.85 - Quantity:  A1 - H207 - £9.85 - Quantity:  A1 - H309 - £16.75 - Quantity:  A0 - H209 - £16.75 - Quantity:  A0 - H311 - £22.15 - Quantity: