Which size Bummis fit flips best?

Hi
Anyone know which size Bummis fit flips best on medium setting?

thanks!

I use medium and they fit fine.

is medium the baby size ones for 15-30 lbs?

Yes I believe you are right. I bought mine for my oldest under the "Cotton Bottom" label but they are one and the same I think from looking at the wrap label. I couldn't remember the weight as I bought the seven years ago and they are still going strong!

They have blue thread on them if that helps!