---
title: dimensions
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtltensor/dimensions
---

# dimensions

An array of sizes, in elements, one for each dimension of this tensor.

## Declaration

```swift
var dimensions: MTLTensorExtents { get }
```

## Discussion

Discussion You are responsible for ensuring dimensions meets the following requirements: dimensions[i] must be greater than 0. If dataType is a format MTLTensorDataType, dimensions[0] must be a multiple of 32 elements. If the tensor has auxiliary planes, each dimension must be evenly divisible by its corresponding block factor. If dataType is a format MTLTensorDataType, or the tensor has auxiliary planes, the tensor must have rank 1 or higher. The default value of this property is a rank one extents with size one.