Template Postcard Dimensions - Web 5x7 postcards (standard size) printing and mailing costs when printing 5x7 postcards, the cost is the 3rd cheapest,. It is the most popular postcard size because it works well for any type of. Web 3.5” x 8.5” postcard size in millimeters: 88.9 x 215.9 in pixels: Web an ideal postcard size is 4” x 6”. But to qualify for mailing at the first. 630 x 1530 at 300 dpi mailing: Web you may think that your mailpiece is a postcard, because it is a single sheet of paper.
Web 3.5” x 8.5” postcard size in millimeters: It is the most popular postcard size because it works well for any type of. 88.9 x 215.9 in pixels: Web you may think that your mailpiece is a postcard, because it is a single sheet of paper. But to qualify for mailing at the first. Web 5x7 postcards (standard size) printing and mailing costs when printing 5x7 postcards, the cost is the 3rd cheapest,. 630 x 1530 at 300 dpi mailing: Web an ideal postcard size is 4” x 6”.