---
title: "init(size:)"
framework: swift
role: symbol
role_heading: Initializer
path: "swift/simd3/init(size:)"
---

# init(size:)

Returns a new vector from a Spatial size.

## Declaration

```swift
init(size: Size3D)
```

## Discussion

Discussion Values rounded to a representable value, if necessary. note: This function is provided as a convenience. All Spatial storage and calculations are double-precision.