Can be knit in DK, 4ply or 3ply yarn -

DK - 4mm & 3.25mm needles, 6 balls 50g DK. 5.5sts & 7 rows to 1” over pattern
4ply - 3.25 & 2.5mm needles, 4 balls 50g 4ply. 7sts & 9 rows to 1” over pattern
3ply - 3mm & 2.5mm needles, 3 balls 50g 3ply. 8sts & 10 rows to 1” over pattern