Vintage Childs Collar
In US terms
This pattern can use any yarn and hook combination. I have generally gone for a DK with a 4.5mm - 6mm hook.
This gives you a collar that should fit a toddler.
Hdc in the 2nd chain from hook (53)
Ch 3, Trb in next 3 St, *2 Trb in next Stitch, Trb in next 3 St* Repeat to end (67)
Ch 1, Sk 1st St, 5 Trb in next St, *Sk 1 St, Sc, Sk 1, 5Trb* Across. Slst into turning chain of previous row.