This is a great product. I'm 5'5" and it's the right size for me, just make sure you inflate it as far as you can - your hips should be higher than your knees. I've just been on a course for calm birthing and the instructor had exactly the same ball- so it should be good! I'm 8 months pregnant at the moment and am finding the ball comfy to sit on and do exercises with. It's meant to help get the baby in the right position for birth. The pump is good, and there are a couple of extra plugs included.