The patttern is for size 0-6 months, 6-12 months, and Toddler.

Around 70/85/100 yards or 65/80/95m yarn is used for the hat,
30/35/40 yards or 28/33/38m yarn is used for the visor headband, and
13/14/15 yards or 12/13/14m yarn is used for the headband
6 yards/5m yarn is used for heart decoration

Skill level of the pattern is easy - requires some experience.
The pattern is detailed with easy to follow directions, includes many pictures and stitch counts to help explain.