# edgeRadius

> Controls the radius of all edges created by the collider.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public float edgeRadius { get; set; }
```

### Remarks

The edge radius controls a radius extending around the edge.  When an edge has zero radius it is effectively infinitely thin.  When an edge has a radius greater than zero, each edge acts like a 'capsule' shape with rounded ends.

It is important to know that when using [Rigidbody2D.useAutoMass](/engine/6000.0/script-reference/unityengine/rigidbody2d/useautomass.md), changing the edge radius does not change the calculated [Rigidbody2D.mass](/engine/6000.0/script-reference/unityengine/rigidbody2d/mass.md) even though the collision area has changed.  The mass is calculated as if the edge radius is zero i.e.not used.