This is a pattern for a faux kimono onesie. The sizes are from 50 to 80.
To make this onsie you need followin length on the fabric:
50 - 45cm
56 - 45cm
62 - 50cm
68 - 50cm
74 - 55cm
80 - 55cm
For more instructions about how to make this onesie (in swedish) https://hallonsmuladesign.files.wordpress.com/2016/02/tutorial-body-med-fuskomlott1.pdf