Experienced, maybe intermediate: spike stitch

Measurements
Width: 25.5cm (10in)
Diameter (at neck): 43.25cm (17in)

Yarn
Knitted using 100g each of Amitola Grande shade 507 Tango (A) and 527 Amelia (B).

Tension/gauge
Approximately 4 ch sts to 2.5cm (1in) over Flame stitch pattern.