Birthing ball size for "petite" lady?

[Gingerbreadpixie]

Will a 65cm birthing ball be too big for me as I'm only 5ft tall? It's the smallest size I've seen. Would I just pump it up a bit less to make it a bit smaller?

Any other petite ladies out there used a ball this size?

I'm 5'2. I found the big ball in the hospital far better than the small one I had at home.

Thank you. I found a 55cm ball but I think I might just go for the 65cm as i want to have my hips raised higher than my knees to help with baby's position