They do carry a couple different sizes..... Mine were in the NICU for a bit and they provided them.....I think they are about 10 bucks in stores..... Maybe a LC could help
I used this and i honestly thought it was awesome because it gave me some relief but I do agree with the previous comment, baby might not latch if used all the time, I would use it a few times and a few times without each day :)
Every baby is different but with using it you also take that chance of baby no longer taking the actual nipple if your going to use it often. I have a friend that started using it 24/7 for the first two months and then baby wouldn't latch anymore to her actual nipple but she was only using it bcuz breastfeeding was killing her breasts. A lot of the time it does work tho! I just always hated it lol.