you should knit a swatch to ensure that your needle size gives you the correct gauge of 12 sts per 10 cm

4-5 buttons (Ø = 15 mm)

If the child measures 59 cm [23¼ inches] around the chest

Bust circumference:  92 (96) 102 (108) 116 (126) 136 cm [36¼ (37¾) 40¼ (42½) 45¾ (49½) 53½ inches]

For example

Monday Sweater Europeisk skulder you should knit a swatchThe Monday Sweater is worked from the top down with raglan increases to shape the yoke. The neck rib edge is folded and knitted together (to form a double neckband) and short rows are worked at the back of the neck to shape the neckline and raise the back. The sleeves are worked in the round on double pointed needles or on a circular needle using the Magic Loop technique. Size guide The Monday Sweater is designed to have approx. 15 20 cm [6 8 inches]