## On this page

  

 

 # read\_size\_field

 Last update: 16.10.2025 

<a id="ansys.meshing.prime.FileIO.read_size_field"></a>

#### FileIO.read\_size\_field(file\_name, params)

Read a PyPrimeMesh size field (PSF and PSF.GZ) file from disk.

- **Parameters:**
    
    **file\_name**: Path to the size field file on disk.
    
    **params**: Parameters for reading size field file.
- **Returns:**
    
    [`SizeFieldFileReadResults`](ansys.meshing.prime.SizeFieldFileReadResults.md#ansys.meshing.prime.SizeFieldFileReadResults): Results from reading the size field file.
- **Return type:**
    
    [`SizeFieldFileReadResults`](ansys.meshing.prime.SizeFieldFileReadResults.md#ansys.meshing.prime.SizeFieldFileReadResults)

### Notes

This method does not support Unicode paths.

### Examples

```pycon
>>> file_io = prime.FileIO(model=model)
>>> params = prime.ReadSizeFieldParams(model=model)
>>> results = file_io.read_size_field("/tmp/my_prime_sizefield.psf", params)

```