V-neck cardigan can be knit with long sleeves or as a sleeveless vest/tank.

Sizes: to fit chest
0-6 mo (chest size 16”/41cm)
6-12 mo (chest size 18”/46cm)
1-2 yrs (chest size 20”/51cm)
2-3 yrs (chest size 22”/56cm)
4-5 yrs (chest size 24”/61cm)
6-7 yrs (chest size 26”/66cm)

Yarn Requirements: DK weight, 50g balls
Waistcoat: 2 (2, 2, 3, 3, 4) balls
Cardigan: 2 (3, 3, 4, 5, 6) balls

Sirdar website link: Tiny Tots DK 1909