Its also important to get the proper grip because; your hands are controlling the ping g15 irons. So, keep in mind not all grips with g15 driver are exactly the same, some are round and some have a rib down the back. They come in all various sizes from .60 (little) to midsize, some are all rubber, some have cork in ping g15 driver and some have a combination of both.
So in conclusion when selecting new g15 irons keep in mind to try a couple of demos and don't be afraid to ask your P.G.A Golf Expert for help.