Roller Derby Babies Pattern

I created these hats for a friend who plays roller derby. One of her teammates was expecting twin girls, and she wanted a gift to get these new derby girls off to the right start.

For those unfamiliar with roller derby, these designs are the helmet covers worn by the jammer and the pivot, two critical positions on the team. In real life, they look something like this:

Image from Molly's Skivvies, purveyor of derby goods

To make my hats, I looked for a basic baby hat pattern to give me roughly the right proportions. I decided on Bev's Newborn Roundie by Beverly A. Qualheim because it's simple and the instructions are easy to understand.

From there, I made quite a few modifications, so here is my final pattern:

Materials
Approximately 50 yards worsted weight yarn for hat. I used Caron Simply in Soft in White.
Approximately 15 yards worsted weight yarn for embellishments. I used Red Heart Shimmer in Red.
G Hook
One safety pin style stitch marker
Yarn Needle

Round 1: Create a magic circle. Ch 3 (counts as 1 dc), 14 dc into loop (15 sts)
Starting with round 2, mark the first stitch of each round with a stitch marker, moving the marker up as you work.
Round 2: 2 dc into top of ch 3 from previous round, [dc into next st, 2 dc into next st] around (23 sts).
Round 3: Repeat round 2 (35 sts).
Round 4 - 9: [2 dc, dc] around. (This leads to an increase of one stitch per round. Round 9 = 41 sts).
Round 10: Dc around (41).
Round 11: [Sc into next 5 sts, sc 2 tog] five times, 6 sc. Slip stitch into first stitch in the round, finish off (36).

For the pivot hat stripe embellishment:
Ch 13.
Row 1: Dc in 4th ch from hook, dc across. Ch 3 and turn.
Row 2 - 21:  Dc across, ch and turn.
Pin the stripe down the center of the hat to find the correct placement. Stitch the stripe on using the stripe color and a yarn needle.

For the jammer hat star embellishment:
This star is based on the Simple Little Star pattern by Melissa Trenado, with just a slight modification.
Make 2.
Round 1: Ch 2. 5 sc in 2nd ch from hook.
Round 2: 2 sc in each st around.
Round 3: [Sc, ch 5, sc in 2nd ch from hook, hdc, dc in next 2 ch. Skip next sc from round 2. Sc into next sc from round 2.] five times to create five points.*
Round 4: [4 sc up first side of point, 3 sc in top stitch, 4 sc down remaining side] five times. Sl st into first sc. Fasten off.
Pin one star to opposite sides of the hat to find the correct placement. Stitch the stars on using the star color and a yarn needle.

*I initially found this row a little confusing. To add a little clarity, you are working the point of each star over three stitches of row 2. First, you do a sc, then ch 5. This chain becomes a base over which you work 1 flat row that forms a triangle due to increasing the height of the stitches. Finally, you attach your new triangle back to round 2 by skipping the 2nd sc and doing a sc into the 3rd sc from round 2. I'm sure this is still pretty confusing, but it makes sense once you do the first one!