---
title: primitiveDataElementSize
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4accelerationstructuregeometrydescriptor/primitivedataelementsize
---

# primitiveDataElementSize

Sets the size, in bytes, of the data for each primitive in the primitive data buffer primitiveDataBuffer references.

## Declaration

```swift
var primitiveDataElementSize: Int { get set }
```

## Discussion

Discussion This size needs to be at most primitiveDataStride in size and a multiple of 4 bytes. This property defaults to 0 bytes.