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# torch.Size
{class}`torch.Size` is the result type of a call to {func}`torch.Tensor.size`. It describes the size of all dimensions
of the original tensor. As a subclass of {class}`tuple`, it supports common sequence operations like indexing and
length.
Example:
```{code-block} python
>>> x = torch.ones(10, 20, 30)
>>> s = x.size()
>>> s
torch.Size([10, 20, 30])
>>> s[1]
20
>>> len(s)
3
```
```{eval-rst}
.. autoclass:: torch.Size
:members:
:undoc-members:
:inherited-members:
```
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