Printer specifications are real and accurate and meaningful, but are not to be confused with image resolution. Printer ink dots and image pixels are simply very different things, and one color image pixel requires many printer ink dots. This is why we need a 1200 dpi printer (ink dots) to print an image at 250 dpi (pixels).
Q: What are the standard postcard sizes you offer? A: For flat standard postcards, available sizes are as follows: 4 x 6, 4.25 x 6, 5 x 7, 5.5 x 8.5, 6 x 9, and 6 x 11. Folded postcards have 2 kinds: half-folds and tri-folds.
To qualify for postcard pricing, your mailer must be at least 3 Â½â high, 5â long and 0.007â thick (approximately the thickness of an index card), but no more than 4 Â¼â high, 6â long, or 0.016â thick. To qualify for the base rate, postcards cannot be folded.