glockman is right...see how it looks, check her anchor points and her comfort. her draw arm should be inline with the arrow at full draw and she should be comfortable and have a slight bend in her bow arm at full draw. the string also touches the tip of my nose perfectly for me. i have a 28" draw but shoot a 27" arrow. if i shot a wisker biscuit i could get away with even shorter. arrow legnth has little to do with draw legnth. im not so thrilled about a short arrow so im going to a 28 or 29 next year. mine comes behind the front of the riser. another thing to look at with arrows is the proper spine. thats more important than the legnth of them. if they are spined right they could be a foot too long and still fly right.

if you dont know take her to a shop and have the bow fitted for her. thats the best option. while your there it might not hurt to have the bow tuned for her as well.