Little Rhody,

I shoot 27" arrows with a 29" draw....your draw has little to do with it depeding on the bows setup. Usually I recommend arrows being just an inch past the rest at full draw, again depending on the arrow rest...over draw or off the shelf....

There are arrow selection charts that help with picking an arrow that is spined correctly for arrow length, bow poundage and arrow head weight....I recommend selecting arrows with in said chart.

For not knowing your correct arrow length, I recommend a good pro shop or atleast a good friend that can measure what you will need while at full draw.