---
title: "convert(size:from:to:)"
framework: realitykit
role: symbol
role_heading: Instance Method
path: "realitykit/realitycoordinatespaceconverting/convert(size:from:to:)"
---

# convert(size:from:to:)

Converts a 3D size vector from a RealityKit coordinate space to a Size3D in a defined SwiftUI coordinate space.

## Declaration

```swift
func convert(size: SIMD3<Float>, from realitySpace: some RealityCoordinateSpace, to space: some CoordinateSpaceProtocol) -> Size3D
```