Many people associate notations such as 'A4', 'A3', 'B1', and 'B2' when they hear 'paper size'. This notation used for the size of copy paper and notebooks is defined by the international standard ISO ...
A trend is sweeping the internet where women (and some men) are holding up pieces of 8.3-inch-wide A4 printer paper to show how tiny their waists are. It’s called the #A4Waist or #A4WaistChallenge, ...