Patent ID: 7059978

Claim:
A golf ball having a core, a cover and 240 or more and 360 or less dimples, said cover comprising an ionomer resin and a thermoplastic elastomer containing a styrene block as a principal component, and having a thickness of 1.0 mm or greater and 1.8 mm or less and a hardness of 50 or greater and 60 or less, said dimples comprising (x) two or more kinds of circular dimples having a diameter of 3.90 mm or greater and 4.80 mm or less, and (y) noncircular dimples, or circular dimples having a diameter of less than 3.90 mm, proportion PN of the number Na of the circular dimples (x) having a diameter of 3.90 mm or greater and 4.80 mm or less to a total number N of the dimples being equal to or greater than 75%, volume Va of the circular dimples (x) having a diameter of 3.90 mm or greater and 4.80 mm or less being greater than 300 mm 3 , proportion PV of said volume Va to a total volume V of all the dimples being greater than 95.0%, and occupation ratio of total area of the dimples to the surface area of a phantom sphere being equal to or greater than 75%.