| 摘要 |
Golf ball 28 has a first side face 32, a second side face 34 and a third side face 36. The first side face 32 is positioned between an edge E and a point P. The second side face 34 is positioned between the point P and a point Q. The third side face 36 is positioned between the point Q and a point R. Each side face 32, 24, 36 is inclined in the in-depth direction toward the inward side. An angle alpha 1 of the first side face 32 is 2.0° or greater and 11.0° or less. An angle alpha 2 of the second side face 34 and an angle alpha 3 of the third side face 36 are equal to or less than 30.0°. The angle alpha 3 is greater than the angle alpha 2. The angle alpha 2 is greater than the angle alpha 1. The golf ball 28 also has a curved face 38 . The curved face 38 is a part of a spherical surface.
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