I HVE 3 PAIRS OF THE GRAND CATALINA ,THEY FIT WELL ,AND I DO NOT HAVE A REALLY BIG HEAD,GO TO FRAMES DIRECT ONLINE THEY WILL HELP YOU ON SIZES,THEY UNREAL POLARISED GLASSES BUT BE SURE AND GET GLASS LENS,IN AMBER. ALL THE MIRRORS ARE AMBER.4 YEARS NO SCRATCHS.THE BIGGER LENS THE BETTER FIELD OF VIEW ALSO LESS BASE CURVE,LESS DISTORTION.STAY AWAY FROM POLYCRAB LENS.I AM THE SAME SIZE AS LUKE ,ASK WINGA.