{TAIL ~ The golf club head} 1, wherein a width Pu of {HEAD ~ an upper portion} of each protrusion satisfy: 
{ TAIL ~ The golf club head } 1 , wherein a width Pu of { HEAD ~ an upper portion } of each protrusion satisfy :
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH