For small girls, I tend to include "hi little one" or "of course you may little one" somewhere in the convo. Then, while flirting:
-Don't get SHORT with me missy!
-SHORT sighted comments like that will only leave you SHORT handed.
-HB: blah blah PUA: "Im sorry I can't hear you from up here"
These only work if you really aren't holding her height against her. What i mean by that is if you a malicious guy whose looking to get girls back for years of SPAM and throw these looking to cause damage, they will. And you will loose the set and more importantly have some inner game/work to do on yourself.
But, if like me your a goofball who enjoys flirting (and finds something sexy about the little one's

) then throw these out with a smile on your face and have fun with it.