(See overview for a simple definition) The larger the mesh size, the finer the material particle size; The smaller the mesh size is, the larger the material size is.

Screen size is the size of the mesh through which the particles can pass through the screen, expressed in terms of the number of mesh in a screen one inch (25.4mm) wide, and thus called mesh size.

The specifications of the standard sieve vary from country to country, the commonly used Taylor system is the number of holes per inch, called mesh.

For example, 100 sieves represent 100 holes per inch of screen mesh.

The mesh size corresponds to the standard mesh size

Screen Size：4.75mm     Standard Mesh：4Mesh
　　Screen Size：3.90mm     Standard Mesh：5Mesh
　　Screen Size：3.35mm     Standard Mesh：6Mesh
　　Screen Size：2.80mm     Standard Mesh：7Mesh
　　Screen Size：2.36mm     Standard Mesh：8Mesh
　　Screen Size：2.00mm     Standard Mesh：10Mesh
　　Screen Size：1.70mm     Standard Mesh：12Mesh
　　Screen Size：1.40mm     Standard Mesh：14Mesh
　　Screen Size：1.19mm     Standard Mesh：16Mesh
　　Screen Size：1.00mm     Standard Mesh：18Mesh
　　Screen Size：0.840mm    Standard Mesh：20Mesh
　　Screen Size：0.710mm    Standard Mesh：25Mesh
　　Screen Size：0.590mm    Standard Mesh：30Mesh
　　Screen Size：0.500mm    Standard Mesh：35Mesh
　　Screen Size：0.420mm    Standard Mesh：40Mesh
　　Screen Size：0.350mm    Standard Mesh：45Mesh
　　Screen Size：0.297mm    Standard Mesh：50Mesh
　　Screen Size：0.250mm    Standard Mesh：60Mesh
　　Screen Size：0.212mm    Standard Mesh：70Mesh
　　Screen Size：0.178mm    Standard Mesh：80Mesh
　　Screen Size：0.150mm    Standard Mesh：100Mesh
　　Screen Size：0.124mm    Standard Mesh：120Mesh
　　Screen Size：0.104mm    Standard Mesh：140Mesh
　　Screen Size：0.089mm    Standard Mesh：170Mesh
　　Screen Size：0.0740mm    Standard Mesh：200Mesh
　　Screen Size：0.0610mm    Standard Mesh：230Mesh
　　Screen Size：0.0530mm    Standard Mesh：270Mesh
　　Screen Size：0.0440mm    Standard Mesh：325Mesh
　　Screen Size：0.038mm    Standard Mesh：400Mesh
　　Screen Size：0.030mm    Standard Mesh：460Mesh
　　Screen Size：0.026mm    Standard Mesh：540Mesh
　　Screen Size：0.021mm    Standard Mesh：650Mesh
　　Screen Size：0.019mm    Standard Mesh：800Mesh
　　Screen Size：0.015mm    Standard Mesh：900Mesh
　　Screen Size：0.013mm    Standard Mesh：1100Mesh
　　Screen Size：0.011mm    Standard Mesh：1300Mesh
　　Screen Size：0.010mm    Standard Mesh：1600Mesh
　　Screen Size：0.008mm    Standard Mesh：1800Mesh
　　Screen Size：0.0065mm    Standard Mesh：2000Mesh

A plus or minus sign before the mesh indicates whether the mesh can be missed.

A negative number indicates the mesh that can leak through the mesh, that is, the particle size is smaller than the mesh size;

A positive number indicates that the mesh cannot be missed, that is, the particle size is larger than the mesh size.

For example, the size of particles is -100 mesh ~+200 mesh, which means that these particles can leak through 100 mesh holes but cannot leak through 200 mesh. When screening such mesh size particles, those with large mesh (200) should be placed under the screen with small mesh (100), while those with large mesh (200) should be left behind in the screen with large mesh (200).