Code to shrink font size after the first 3 characters and spaces

I'm looking for a way to quickly make the font size of a text string within a cell smaller than the first 3 characters. For Example:

11 Smaller
12 Smaller
13 Smaller
14 Smaller
etc...

The numbers I want the font size to be 11 for example and for the "Smaller" part I want the font size to be 9.

I need to be able to do this for multiple cells quickly instead of manually going to each cell and highlighting the smaller part and changing the font size.

Thanks in advance!