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