My daughter is almost 2 but she is super tall. I just made this pattern up, so if you want to make it, I will share some tips.
I ordered 2 packs of fabric and used 1 1/2 packs of the stitches fabric. I just sewed them together to create a tube. Make sure you sew in the ties at the same time - I wanted them to go all the way around her, so I attached both of them in the same place.
I folded the top 4 inches down on the top to create the ruffle on the top and the space for the elastic. I stitched twice across like shown... the space between 2 and 3 1/2 inches is for the elastic.Sorry I don't have more pictures. Let me know if you have any questions!