Hat with open top visor. Tennis cap. IT IS COMPATIBLE WITH ALL HEAD STRUCTURES THANKS TO ITS BACK ADJUSTABLE VECLE STRUCTURE. SIZE CHART: 55Cm(XS) - 56Cm(S) - 57Cm(S/M) - 58Cm(M) - 59Cm(L) - 60Cm(L/XL) - 61Cm(XL) How to Take Head Measurement? When you measure your head circumference 1 cm above your eyebrow, the measurement you find is your head measurement. MAIN FABRIC 100.00% Cotton STORAGE RECOMMENDATION Store in a dry and ventilated place. Thanks to its special component fabric, it is very light and pleasant to wear.