<!--
{
  "availability" : [
    "iOS: 26.0.0 -",
    "iPadOS: 26.0.0 -",
    "macCatalyst: -",
    "macOS: 26.0.0 -",
    "tvOS: 26.0.0 -",
    "visionOS: 26.0.0 -",
    "watchOS: 26.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Spatial",
  "identifier" : "/documentation/Spatial/Size3DFloat/-(_:)",
  "metadataVersion" : "0.1.0",
  "role" : "Operator",
  "symbol" : {
    "kind" : "Operator",
    "modules" : [
      "Spatial"
    ],
    "preciseIdentifier" : "s:So13SPSize3DFloata7SpatialE1sopyA2BFZ"
  },
  "title" : "-(_:)"
}
-->

# -(_:)

Returns a size that’s the element-wise negation of the size.

```
static func - (size: Size3DFloat) -> Size3DFloat
```

## Parameters

`size`

The value.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)