Evoke Callisto MIPS Wide Brim Helmet bridle parts contrast text design knit down AMAF 38MCXS contrast text design knit down the sleeves reading "WALK TROT CANTER" for a charming nod to the rider's lifestyle Contemporary feminine fit that's flattering whether tucked or untucked ensuring top tier performance for the serious equestrian Helmet Shell Target Head Size Padding Thickness Fit Profile Small Shell 53 cm 9 mm Standard Fit 54 cm 6 mm Standard Fit 55 cm 4 mm Standard Fit 55 cm (Custom) 2 mm Custom (Looser Fit) Medium Shell 56 cm (Custom) 15 mm Custom (Max Snug) 56 cm (Custom) 12 mm Custom (Extra Snug) 56 cm 9 mm Standard Fit 57 cm 6 mm Standard Fit 58 cm 4 mm Standard Fit 58 cm (Custom) 2 mm Custom (Looser Fit) Large Shell 59 cm (Custom) 15 mm Custom (Max Snug) 59 cm (Custom) 12 mm Custom (Extra Snug) 59 cm 9 mm Standard Fit 60 cm 6 mm Standard Fit 61 cm 4 mm Standard Fit