Little girl tights

OK...I've been shopping for tights for Alison. We have a wedding to go to tomorrow and she desperately needs tights that fit. Here's the thing: they come in sizes 4-6 and 7-11. Well, Alison is kind of between a 6 and a 7. The 4-6 tights are too short...she gets a major wedgie when wearing them. The 7-11 tights...well, obviously those are WAY too long and she gets elephant ankles. What's a little girl to do?