Here is the completed, polished, and clearly formatted version of your crochet hat keychain pattern, picking up where Round 6 cut off and cleaning up the overall instructions:

Skill Level: Easy

Hook Size: 2.00 mm

Abbreviations

• ch: chain
• sc: single crochet
• dc: double crochet
• inc: increase (2 stitches in the same stitch)
• sl st: slip stitch
• rsc: reverse single crochet (crab stitch)

Pattern Instructions

Round 1:

Magic ring, ch 3 (counts as 1 dc). Work 19 dc into the ring. Sl st to the top of the initial ch-3 to join. (20 dc)

Round 2:

Ch 1 (does not count as a stitch). Work 1 sc in each stitch around. Sl st to the first sc to join. (20 sc)

Round 3:

Ch 1. Work 1 sc in each stitch around. Sl st to the first sc to join. (20 sc)

Round 4:

Ch 1. Work 1 sc in each stitch around. Sl st to the first sc to join. (20 sc)

Round 5:

Ch 1. Work 1 sc in each stitch around. Sl st to the first sc to join. (20 sc)

Round 6 (Brim):

Ch 3 (counts as 1 dc). Work 1 dc in the same base stitch. Work 2 dc in each of the remaining 19 stitches around. Sl st to the top of the initial ch-3 to join. (40 dc)

Round 7 (Brim Edge):

Ch 1. Work 1 reverse single crochet (crab stitch) in each of the 40 stitches around. Sl st to join, fasten off, and weave in your ends. (40 rsc)

Finishing Touches

1. Add Keychain Hardware: Attach a jump ring and keychain ring through the center top (Round 1) or along the brim edge.
2. Optional Decorating: Add a small ribbon, bow, or contrasting yarn band around the crown (between Rounds 5 and 6) to make it pop!

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Video tutorial: