Standard A Sizes for Printing - A0 size is 1189 x 841mm, A1 size is 841 x 594mm, A2 size is 594 x 420mm, A3 size is 420 x 297mm, A4 size is 297 x 210mm
A-series paper formats size, A0 A1 A2 A3 A4 A5 A6 A7 with labels and dimensions in milimeters. International standard ISO paper size proportions the actual real millimeter size. Stock Vector
Paper size - Wikipedia
A0, A1, A2, A3, A4 sizes for posters, canvas & picture framing
Paper Sizes A1 A0 A2 A3
Standard Paper Sizes - Australia - Rogue Print and Mail
A4 paper format / International standard paper sizes
Card and Paper Size Guide
Paper Size Guide - A0, A1, A2, A3, A4, A5, A6
A0 Poster Each
Paper Size Chart Guide to Sizes A0, A1, A2, A3, A4, A5, A6