Postcard Size Standard. The legal postcard size for standard sized postcards should be at least 36 x 56 90 mm x 140 mm. And commend your uniqueness.
Most ISO standard sizes are all based on the 2 ratio which means the length of a sheet is equal to its width times 14142. What Is The Standard Postcard Size. The following sizes are approved for Every Door Direct Mail EEDM.
The standard postcard size is 4 x 6 or 5 x 7.
425 x 55 4 x 6 425 x 6 5 x 7 6 x 8 55 x 85 4 x 9 6 x 9 and 6 x 11. What are the standard postcard sizes available. Continental Size 4X6 inches 15 cm X 105 cm Many of the new cards you purchase today are of this size. If you even want to mail out a 10 x 12 piece that is also possible - it just may cost more for postage.