# Background meshes (Tutorial 7)

Use a background mesh to accurately specify mesh sizes on the entire domain. Background 
meshes are a simple kind of [size fields](size-fields.md).

[**Download the background mesh file used in this tutorial**](https://gitlab.onelab.info/gmsh/gmsh/-/raw/master/tutorial/t7_bgmesh.pos?inline=false)

### Python
```python
{{#include ../../../../tutorial/python/t7.py}}
```
