K.C.
We liked Pampers Baby Dry best. Recommend going one size bigger than she needs by weight to be safest, regardless of what brand you choose. So, in Pampers, I would buy a size 6.
BTW ... We bought these to protect the memory foam mattress. Genius and amazing .... http://bedwettingstore.com/reusable-waterproof-overlays.html .... Worth every penny.