Width control (min-content + 10px)

Is there a way to add a fix number to the calculated width that gets added to the main span which holds the drop down?

<span class="select2 select2-container select2-container--classic"
   style="width: 237.017px;">

I would think it would be a simple +10 in the (Select2 4.1.0-rc.0) select2.js file.

Using font-size: small; in .select2-container helps, but it is not always enough.