At 150 ppi the image needs to be 1754 x 2480 pixels.

A3 print size. An a3 piece of paper will fit into a c3 envelope. When folded in half it will fit into a c4 envelope. Cutting it in half will create two a4 sheets of paper.

An a3 piece of paper measures 297 420 mm or 117 165 inches. Resolution needed to print an a3 size picture at 300 ppi pixels per inch the image needs to be 3508 x 4961 pixels. An a3 size page is 329 mm x 483 mm w x h and is a slightly oversized version of a3 being 32 mm larger in width and 63 mm larger in height.

This gives it an aspect ratio of 11468 rather than the 1root 2 aspect ratio of the iso series paper sizes. It has dimensions of 329mm x 483mm 13 x 19. A3 is part of the a series and is defined by the iso 216 international paper size standard.

A3 size in inch a3 paper size in inch is 1169 x 1654 inches. In actuality the a3super a3 name is quite misleading as this paper size is known as b or super b in the united states and is ansi b with a 1 margin for print bleed. A printer that supports a3 media as standard will allow you to print onto a3 documents with ease just as easy as a standard a3 or a4 page whereas other printers can allow you to set up an a3 document as a custom size.