An A7 piece of paper measures 74 × 105 mm or 2.9 × 4.1 inches. Cutting it in half will create two A8 sheets of paper. An A7 piece of paper will fit into a C7 envelope. When folded in half, it will fit into a C8 envelope. A7 is part of the A series and is defined by the ISO 216 international paper size standard.
