There is no "smallest measurement" in a meter. You can keep dividing a meter into smaller and smaller fractions.

Here are some examples:

* Millimeter (mm): 1/1000 of a meter

* Micrometer (µm): 1/1,000,000 of a meter

* Nanometer (nm): 1/1,000,000,000 of a meter

And we can keep going even smaller! There's no theoretical limit to how small we can divide a meter.

Let me know if you'd like to know more about any of these units!