This cap is specifically designed with an extended pouch portion at the back for tucking away long hair. Ties securely in back SIZING: Head circumference, Small: 21” to 23”, Medium: 22” to 24”, Large: 23” to 25” (caps run large, be sure to measure your head before choosing a size - most people wear a small or medium cap). Add your initials, name or department to the cap. Embroidery is positioned over the right ear and is limited to 30 characters on one line. Embroidered items are not returnable. Minimizes scatter radiation exposure of the head and brain Patented XPF® Technology contains no lead or heavy metals; non-toxic 0.5mm lead equivalent protection around the front/sides of the head Machine washable; can be wiped down for cleanliness Lightweight and flexible with a wicking material inside cap and a mesh top to provide maximum comfort Made in USA by BLOXR Solutions Makes a great gift for a graduating medical student Solid colors: Red, Blue, Purple, Turquoise, Poppy Red, Yellow, Black, Gray, Green, Orange and Hot Pink. (All fabric options.) Visit the BLOXR website.