Don't give up.....when Bella was smaller, it wasn't so hard to fit her with pjs, but as she grew longer, it was a little harder to find her ones that fit properly. Bella seems to like them better if they fit snug. I guess she's not as bothered with them flopping around.
Make sure the length is right for your baby. You may even have to sew/adjust the ones she has so that the legs will not come out. There's nothing cuter than our furbabies in pjs!