Abstract: A golf ball has a plurality of dimples on a surface thereof. Each dimple has a center portion and an edge portion. The center portion has a bowl shape. The edge portion has a ring shape and is smoothly continuous with the center portion. A cross-sectional shape of the edge portion is a curved line that is convex outward in a radial direction of the golf ball. A sum Vc of volumes of the center portions and a sum Vd of volumes of the dimples satisfy the following mathematical formula: (Vd?Vc)/Vc?2.15. A ratio of a number of the dimples, the center portion of each dimple having a circular contour and the edge portion of each dimple having a non-circular contour, to a total number of the dimples, is not less than 50%.

Abstract: A golf ball 2 has a plurality of dimples 10 on a surface thereof. Each dimple 10 has a center portion 16 and an edge portion 18. The center portion 16 has a bowl shape. The edge portion 18 has a ring shape. The edge portion 18 is smoothly continuous with the center portion 16. A cross-sectional shape of the edge portion 18 is a curved line that is convex outward in a radial direction of the golf ball 2. A ratio P1 of a number N1 of the dimples each having an edge portion 18 that is adjacent to another edge portion 18 such that the edge portion 18 shares a boundary line with the other edge portion 18, to a total number N of the dimples, is not less than 50%.

Abstract: A golf ball has a main body 12 and a paint layer 10 positioned outside the main body 12. The main body 12 has a plurality of minute projections 18 on a surface thereof. The paint layer 10 has a thickness Tp of not less than 5 ?m and not greater than 30 ?m. Each minute projection 18 is embedded in the paint layer 10. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 80% of the thickness Tp. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball has a main body 12 and a paint layer 10 positioned outside the main body 12. The main body 12 has a plurality of minute projections 18 on a surface thereof. The paint layer 10 has a thickness Tp of not less than 5 ?m and not greater than 30 ?m. Each minute projection 18 is embedded in the paint layer 10. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 80% of the thickness Tp. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.

Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The minute projections 18 are exposed on the surface of the golf ball. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. The surface of the golf ball has a maximum height Sz of not less than 5 ?m and not greater than 200 ?m.

Abstract: A golf ball 2 includes a core 4 and a cover 6 positioned outside the core 4. The cover 6 is molded in a mold having support pins by injection molding. A ratio (K/S) of a surface hardness K of the core 4 to an amount of compressive deformation S of the core 4 satisfies the following mathematical formula. 13.0?K/S?24.0 The cover 6 has a hardness H of not greater than 62. A product (?*V) of a latitude ? of each support pin and a volume V of the cover 6 is not less than 300.