Throw up a Shaka wave or put a wave inside a Shaka. Either way, you'll keep the good vibes rolling and we hope those good vibe waves come rolling back to you again and again! Available in Black/White & Royal/White. - 5 panel trucker hat - Snapback for adjustable fit * SIZING TIPS * – Based off the average head circumference, by age (50th percentile growth chart) – Measure in centimeters around the child’s head just above the eyebrows Mini  6 -18 months (45-49 cm) Big 18 months - 5 years (49-53 cm) Super 5 -10 years (53-57 cm)