Postcard size mm關於「A5 size」標籤，搜尋引擎有相關的訊息討論：
圖片全部顯示A Paper Sizes - A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10Dimensions of the A series paper sizes 4A0, 2A0, A0, A1, A2, A3, A4, A5, A6, A7, A8, A9 and A10 width and height in inches (in), millimetres (mm), ...缺少字詞： gl= twA5 Paper Size DimensionsAn A5 piece of paper measu