Ah, I see what you mean, I was thinking in terms of images&#x2F;files.<p>As an arguement it gives % of the input (64GB usb drive, 8GB image):<p><pre><code>  &gt; pv &#x2F;mnt&#x2F;str&#x2F;Downloads&#x2F;stick-8g.img &gt; &#x2F;dev&#x2F;sdi
  916MiB 0:00:35 [1.88MiB&#x2F;s] [========&gt;                                                                           ] 11% ETA 0:04:17
</code></pre>
Otherwise it seems to give the size of the output if it&#x27;s a block device.