PhoebusRyan2 years ago+3+30How do you know which size is the right one?Show in original language (German)pucci2 years ago • purchased this product0+3-3purchased this product Helpful answerFor an adult M/L' is the right oneShow in original language (Italian)Comment1 commentpucci2 years ago • purchased this product+1+10purchased this productI got the M/L and it fits perfectly, I am 177 tall and weigh 79 kg and have normal ears :-) Show in original language (Italian)Comment