CTP (Computer to Print) plates are a special material used in the printing industry to produce high quality printing plates. The CTP plates thickness range is between 0.13-0.40mm. In practice, common plate thicknesses include 0.15mm, 0.20mm, 0.24mm and 0.30mm. The CTP plates width ranges between 650-1420mm. The exact width depends on the specifications of the plate and the requirements of the machine. The allowable deviation in thickness is +0.003mm and in width +0.5mm.

CTP plates are usually available in various sizes, 560*670, 1030*770, 400*525, 650*550, 450*370, 525*419, 1030*790, 576*720, 715*895, 680*608, 525*459, 890*609, etc. The following are some common CTP plates sizes:

1, 650mm x 550mm for 2-page presses

2, 800mm x 600mm: This is a smaller CTP plate size, usually used for small presses or quick printing equipment.

3, 1030mm x 800mm: This is a common CTP plate size for small to medium sized presses such as one or two color presses.

4, 1160mm x 940mm: This is another common CTP plate size for large presses such as four or six color presses.

5, 1200mm x 800mm: This is a larger CTP plate size for larger presses or printing jobs that require larger layouts.

In addition to the sizes listed above, there are a number of other sizes of CTP plates available to meet the requirements of different printing needs.

In practice, CTP plate makers also have certain requirements for plates size. For example, some CTP plate makers support a minimum plate size of 500mm x 400mm and a maximum size of 1070mm x 850mm. Different models of CTP presses also have different requirements for plate size. For example, the maximum plate size for a folio model CTP press may be 838mm x 1140mm or 950mm x 1162mm, while the maximum plate size for a full-open model CTP press may reach 1600mm x 2083mm.

Choosing the right CTP plates size needs to take into account factors such as the model of the printing machine, the requirements of the printing job, and the size of the printed material. Different sizes of CTP plates are suitable for different sizes of printing machines and printing jobs to meet various printing needs.