The letterhead size varies. For instance, in North America, the letter size is typically 8.5 x 11 inches (215 x 280 mm). Whereas in the majority of countries outside this region, business letterheads are printed in A4 size of 8.27 x 11.69 inches (210mm x 297mm). In Flipsnack, you can choose between the classic A4 (794 x 1123 px), or the letter size (816 x 1056 px).