This cover features our state-of-the-art Flexstyle patch, providing unparalleled design detail, subtle dimension, and quality that will last a lifetime. The original Flexfit cap. Only Flexfit offers the patented poly-weave spandex headband to assure you get the perfect fit. This six-panel, 63/34/3 poly/cotton twill/spandex cover features a structured front crown and a cloth back, resulting in a classic, polished look. Pre-curved visor so you'll look good right from the start. Moisture-wicking headband for cooling and comfort. Stretch to fit closure. Available in two sizes: Small/Medium & Large/XLarge. Designed, embellished & packaged in the USA. SM/MD LG/XL Hat Size 6 3/4 - 7 1/4 7 1/8- 7 5/8 Head Size 21 1/4- 22 3/4 22 3/8- 23 7/8 How to Measure: Measure the circumference around the head, above the eyebrow and at the widest part of the head. Divide number by 3.14 for hat size.