How can I change the size of rich:select item individually (not the drop down box, the upper field where the selected item is displayed)?

Imagine the following situation:

<rich:select value="#{someBean.sel1}">

  <f:selectItems value="#{someBean.sels1}" />

</rich:select>

<rich:select value="#{someBean.sel2}">

  <f:selectItems value="#{someBean.sels2}" />

</rich:select>

I know that I can change the size with e.g.

<style type="text/css">

.rf-sel-inp {

  width: 300px !important;

}

</style>

But this changes the size of both rich:select items to the same size, my goal would be, that they both have different sizes (e.g. the upper 200px und the lower 100px).

Thanks for any help,

Georg