If you only want to buy one or the other then go with the 8 oz cause they’ll last longer. My daughter used the 4ozs until around 4 months old and then moved up to the 8 oz bottles.

8 ounce. I had some 4 ounces and they were kinda pointless. You can just put 4 ounces in the 8 ounce bottle. We only used the 4 ounce bottles for about 2 months and then tossed em because he started to drink more than the bottles could hold.

I never used more than 4oz but was usually breast fed and didn't bottle fed much

I have both, but way prefer holding the 4 oz bottles. I will switch when I have to, but for now, I'm super happy to have the smaller ones.

My daughter was breastfed and took bottles when I worked. We never used our 8 ounce bottles.

Ypu might as well just buy 8oz since you can still make just 4oz in an 8 oz bottle and eventually you baby will probably start eatimg more than 4oz so might as well just save money and buy the 8oz.

If u wanna save money just get the 8oz because sooner then later bby will want more then only 4 NOW I personally like the 4oz for pumped milk because mine didn’t pump much milk anyway so it all fit in there and I was good to go