---
title: accelerationStructureSize
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlaccelerationstructuresizes/accelerationstructuresize
---

# accelerationStructureSize

The size of the acceleration structure, in bytes.

## Declaration

```swift
var accelerationStructureSize: Int
```

## See Also

### Retrieving the sizes

- [buildScratchBufferSize](metal/mtlaccelerationstructuresizes/buildscratchbuffersize.md)
- [refitScratchBufferSize](metal/mtlaccelerationstructuresizes/refitscratchbuffersize.md)