NEW MOM QUESTION!

So if I am formula feeding, how many bottles of each size should I start out with? I currently have 2 8oz & 5 4oz... I know that they only use the smaller ones for about a month or two so I was thinking about exchanging the box of 3 small bottles for the bigger 8oz ones? I know that I will need more than two large ones regardless, But if you guys think I need them all I will just buy an additional pack of larger ones and keep all the ones I have shown.

**Also note that the inside of these bottles is a removable rubber pouch so I can buy more of those without having to buy more physical bottles