Re: Mother-ease mamas...
How big is your LO? The large were big on my 20 lb daughter - still fit, though. She was always on the smallest setting even up to 23 lbs. I really think the next size down would have fit her fine. I recall some moms telling me that the smalls fit their LO well into the next weight range. The elastic is very forgiving. Just FYI, in case it helps.