---
title: "init(_:)"
framework: spatial
role: symbol
role_heading: Initializer
path: "spatial/size3d/init(_:)-3y7nr"
---

# init(_:)

Creates a size structure from the specified double-precision vector.

## Declaration

```swift
init(_ xyz: simd_double3)
```

## Parameters

- `xyz`: A double-precision vector that specifies the dimensions.

## See Also

### Creating a 3D size structure

- [init()](spatial/size3d/init().md)
- [init(width:height:depth:)](spatial/size3d/init(width:height:depth:)-4j9bk.md)
- [init(width:height:depth:)](spatial/size3d/init(width:height:depth:)-4kscw.md)
- [init(_:)](spatial/size3d/init(_:)-2ibhr.md)
- [init(vector:)](spatial/size3d/init(vector:).md)
- [init(_:)](spatial/size3d/init(_:)-7kyp0.md)
- [init(_:)](spatial/size3d/init(_:)-6nss1.md)