# gridTemplateColumns

> Defines the columns of a CSS Grid container as a list of track sizes. Only takes effect when display is set to grid.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.UIElements](/engine/7000.0/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
IEnumerable<float> gridTemplateColumns { get; }
```

### Remarks

The used size in pixels of each track, from the last layout pass. At most 65,535 grid containers can report their tracks at the same time. Past that limit, this property is empty for additional containers.