How big is the octagonal sketch paper?

The size of 8-size sketch paper is 285mm×420mm, the size of positive film is 260 mm× 370 mm, and two pieces of 16 paper together are the size of 8-size paper. The international standard of paper is frank, and the size of the whole paper is1194 mm× 889 mm; Correctness is the domestic standard, and the size of the whole paper is 1092mm×787mm. People divide the whole paper into n sheets, which are called n sheets, and the whole paper is also called full opening, which is continuously cut flat, that is, 4 sheets, 8 sheets, 16 sheets, 32 sheets and 64 sheets.

In the past, the size of paper was expressed by the number of "open", such as 8 open, 16 open and so on. At present, China adopts international standards, which stipulate A0, A 1, A2, B 1, B2, etc. Used to indicate the paper format specification. The standard stipulates that the proportional relationship between paper width (represented by X) and paper length (represented by Y) is X: Y =1:n.

According to the basic area of paper format, the format specifications are divided into A series, B series and C series:

1, the folio size of A0 is 841mm×1189mm, and the folio area is1m2;

2.B0 has a width of1000 mm×1414 mm and a width area of 2.5m2

3. The width dimension of 3.C0 is 9 17mm× 1279mm, and the width area is 2.25m2 ..

Divide A0 paper into A 1 specifications along the length direction, and divide A 1 paper into A2 specifications and A8 specifications along the length direction; B0 paper is also divided into B8 specifications in this way.