What is the size of a4 paper in inches?

The size of a4 paper in inches is: 8 ¹⁄₄ × 11 ¹⁷⁄₂₄

which is approximately: 8-1/4 x 11-3/4

or 8.3 x 11.7

Inch is a unit of length. It is used in USA, UK and Canada. 1 inch is equal to 2.54 cm or 25.4 mm. It is 1/12 of feet and 1/36 of yard.

A4 is the standard dimension of paper used in the printers and copiers (copy machines) all over the world. It is the dimension you usually shop in rearms of 500 sheets. We measure the quality of paper in GSM (grams per square meter). The standard weight of the paper we use in printers is 90-100GSM. Thinner papers (bellow 75GSM) are not suitable for general use. Thicker papers (110-150 GSM) is suitable for brochures and posters. 200+ GSM is like magazine covers.

If you want to make a square out of an A4 paper you must make a triangle as in the image below. Then cut the rectangular with a scissor.