I am okay up until Row 19 (the part printed in Bold).
For all sizes follow Rounds 1-7
Chain 3 and join into a ring with a slip stitch.
Row 1) 8 hdc into ring, slst to join (8 sts)
Row 2) ch 2, 2 hdc in ea st, slst to join (16 sts),
Row 3) ch 2, 2 hdc in first st, *hdc in next st, 2 hdc in following st* slst to join (24 sts)
Row 4) ch 2, 2 hdc in first st, *hdc in next 2 sts, 2 hdc in following st* slst to join (32 sts)
Row 5) ch 2, 2 hdc in first st, *hdc in next 3 sts, 2 hdc in following st* slst to join (40 sts)
Row 6) ch 2, 2 hdc in first st, *hdc in next 4 sts, 2 hdc in following st* slst to join (48 sts)
Row 7) ch 2, 2 hdc in first st, *hdc in next 5 sts, 2 hdc in following st* slst to join (56 sts)
***All measurements are with the hat laid flat, so double it to get circumference.
Baby 0-6 months (width measures 7.25”)
Rows 8 – 16 or until hat measures 5” crown to base) ch2, hdc in ea st, slst to join (56 sts)
Row 17) ch 1, sc in next 38 sts, ch 1, turn
Row 18) slst for 22 sts, ch 1, turn
Brim:
Row 19) sc through both rows 17 & 18 for 22 sts, make 2 sc in the 2nd st (by sc these two rows together you are creating a thick row and turning 2 rows into 1), ch 1 turn (23 sts)
Row 20) sl st all the way back, ch 1, turn (23)
Row 21) sc through previous 2 rows, making 2 sc in 5th st from beginning and 5th st from end, ch1, turn (25)
Row 22) sl st all the way back, ch1, turn (25)
Row 23) sc through previous 2 rows, ch1, turn (25)
Row 24) sl st all the way back, DON’T ch1, turn (25) *by skipping the chain 1 it helps to create a rounder edge on the brim
Row 25) still single crocheting through both rows… skip the 1st st, sc in 2nd st and in each st until you get to the 2nd st from the end, sc last 2 sts together (23)
Row 26) sl st all the way back, DON’T ch1, turn (23)
Row 27) still single crocheting through both rows… skip the 1st st, sc in 2nd st and in each st until you get to the 2nd st from the end, sc last 2 sts together (21)
(you should now have 5 thick rows for the brim)
Row 28) slst down the side of the brim, once you reach the base of the hat sc in each st until you reach the seam, slst to join, ch1
Row 29) sc around the entire hat, slst to join.
Tie off and weave in end.