[jQuery] Targeting elements with more than one class

[jez_p]

Please excuse my noobiness, I just started playing with jQuery today
and I cannot seem to find the answer to this:

If you have elements with multiple classes, how do target just one
class?

For example:

<p class="big blue">blah blah blah</p>

<p class="big green">blah blah blah</p>

<p class="small green">blah blah blah</p>

How do I target the <p>'s with the class of "green"?

Thanks in advance.