Pattern can be made in either yarn. Leaflet also has a sweater design (separate Ravelry entry here).

Sizes: to fit chest
3-6 mo (chest size 18”/46cm)
6-12 mo (chest size 20”/51cm)
1-2 yrs (chest size 22”/56cm)
3-4 yrs (chest size 24”/61cm)
5-6 yrs (chest size 26”/66cm)

Yarn requirements (100g balls):
Note: Choose either Kool Kidz or Denim Chunky, only one needed per garment
Kool Kidz Chunky: 2 (2, 2, 3, 3) balls
Denim Chunky: 1 (2, 2, 3, 3) balls