This company definitely has a customer for life in me! I was iffy on purchasing a one piece bc I have a tall boy (we already love the 2 pieces), and the owner of the company sent me one as a thank you for helping them out with comparisons of other brands (which Clover Baby blows out of the water).
I received a size 18-24 for my 14 month old, 23lb, 33" dude and its amazing. Quality is top notch, the print is GORGEOUS, and there is lots of room to grow!! We would have been fine in a size down, but now we just get to wear this for longer!!