I believe when the g-button is first placed they use a Bard which is not one that can be changed at home b/c it doesn't have a deflatable balloon. Once the site is healed, etc I believe you will then be able to decide which button you would like. With our oldest who is now 12 and got his button when he was 5 we went with the Mini. The Mini looks very similar to the Bard as it is flat, it does have the deflatable balloon so you will be able to switch it out at home and the feeding tube locks in like the Mickey. When he got his placed his was an 18 french, 3.5 button. They decided with his previous surgeries and his belly inside looking like spiderwebs that they wouldn't be able to place a bigger one in the future so they gave him a bigger size. He plays soccer, runs around, swims, etc. The one thing that we stuggled with as he has gotten older is his self-confidence. Last year he wanted to wear a hoodie all of the time to "hide" it. He would wear this even when it was 100 degrees outside. We tried to find a solution as to how to make it not so noticable. He was wearing a big bandaid on it to keep it closer to his skin. We had to sit down and talk to him and tell him that this is "saving his life". As much as he hates it he has to understand that this is part of him and in all reality might be for the rest of his life. After this talk things changed. He didn't have to wear a hoodie any longer, he would go to school in a t-shirt and nothing covering it. I was so proud of him for being who he is. We came across some Tagaderm film like what goes over a PICC line. He puts this over his button sometimes if he is wearing a "smaller" t-shirt. It isn't tough on the skin as the bandaids and it does the same job. This is something that we now get with his monthly order along with his other g-button supplies. Hope this helps, and don't hesitate to ask any questions that you might have. This will be a transition for both her and your family but it is well worth it. My son went from being in the 5th % to between the 25th & 50th % for his weight. I will also warn you that she will be in a lot of pain afterwards to make sure they are keeping her comfortable. Thanks and good luck...