The New Era® 39THIRTY™ is our premier stretch-fit style available in a variety of sizes. The shape and fabrics are engineered specifically to create a comfortable fit. You’ll regularly see NFL players wearing the 39THIRTY as part of their official sideline kit. Sizing: S/M = 53.9" - 55.8" (typically fits kids/women) M/L = 57.7" - 59.6" (typically fits men/adults) - 39THIRTY™ - Stretch Fit - 5-Panel Structured Silhouette - Low Profile Contoured Pinched Crown - Pre-curved Visor - Colour: Blue - Style: 70891334