|Personally, hindsight is 20/20, but I would've gotten the XS & S Sandy's if doing it all over again. I went with the MEOS and they were great, but my hunk of chunk fits into Sandy's better, so I had to sell off most of my MEOS(I kept 4 for his diaper bag) anyway. And since I had originally planned on using them birth - PT, selling them and buying new Sandy's cost the same as just using Sandy's the whole time and buying different sizes and selling the old. But it's personal pref, I like the Sandy's better anyway. Whatever you do decide, ME is the way to go though!