---
title: motionVectorSize
framework: Video Toolbox
role: symbol
role_heading: Instance Property
platforms: [iOS 26.0+, iPadOS 26.0+, Mac Catalyst 26.0+, macOS 26.0+, tvOS 26.0+, visionOS 26.0+]
path: videotoolbox/vtmotionestimationsession/motionvectorsize
---

# motionVectorSize

## Declaration

```swift
final var motionVectorSize: VTMotionEstimationSession.BlockSize { get throws }
```

## See Also

### Inspecting the session

- [label](videotoolbox/vtmotionestimationsession/label.md)
- [sourcePixelBufferAttributes](videotoolbox/vtmotionestimationsession/sourcepixelbufferattributes.md)
- [useMultiPassSearch](videotoolbox/vtmotionestimationsession/usemultipasssearch.md)