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Golf's experimental 15-inch hole is an unholy abomination (but the idea is right) | For The Win
A Birdbath-Size Hole and the Future of Golf - The New York Times
Golf Hole Putting Cup For Practice Putting Green | Set Of 2 Golf Cups - Conform To Usga Regulations, Abs Ivory White, Dimension 4" Depth, Diameter 4 1 | Fruugo NO
Head of PGA of America suggests quadrupling size of holes | Daily Mail Online