---
title: VTMotionEstimationSession.BlockSize
framework: Video Toolbox
role: symbol
role_heading: Enumeration
platforms: [iOS 26.0+, iPadOS 26.0+, Mac Catalyst 26.0+, macOS 26.0+, tvOS 26.0+, visionOS 26.0+]
path: videotoolbox/vtmotionestimationsession/blocksize
---

# VTMotionEstimationSession.BlockSize

## Declaration

```swift
enum BlockSize
```

## Topics

### Enumeration Cases

- [VTMotionEstimationSession.BlockSize.blockSize16x16](videotoolbox/vtmotionestimationsession/blocksize/blocksize16x16.md)
- [VTMotionEstimationSession.BlockSize.blockSize4x4](videotoolbox/vtmotionestimationsession/blocksize/blocksize4x4.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Inspecting the motion result

- [VTMotionEstimationSession.Motion](videotoolbox/vtmotionestimationsession/motion.md)