---
title: extents
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/boundingbox/extents
---

# extents

The extents of the bounding box.

## Declaration

```swift
var extents: SIMD3<Float> { get }
```

## Discussion

Discussion This value is (0, 0, 0) if the box is empty.

## See Also

### Getting the box characteristics

- [max](realitykit/boundingbox/max.md)
- [min](realitykit/boundingbox/min.md)
- [center](realitykit/boundingbox/center.md)
- [boundingRadius](realitykit/boundingbox/boundingradius.md)