A sizes

A sizes

or

A series

n
a series of paper sizes approved by the International Standards Organization, running from 2AO to A7, each size (defined in mm) being half as large as the one preceding it, as follows: 2AO,1189 × 1682; AO, 841 × 1189; A1, 594 × 841; A2, 420 × 594; A3, 297 × 420; A4, 210 × 297; A5, 148 × 210; A6, 105 × 148; A7, 74 × 105
References in classic literature ?
Thence we sailed to the isle of Rohat where the camphor trees grow to such a size that a hundred men could shelter under one of them with ease.
The river here assumed a size and appearance which, even at the highest point we ultimately reached, was scarcely diminished.