Our 14th green at Pensacola CC was the smallest on the PGA Tour for years, until 1982 when the Pensacola Open moved away because of the tight grounds. Maybe 1800 SF, the green falls off abruptly in the back. The 2nd green at Presidio in SF reminded me of that green.
A large deep bunker guarded the left side, and a fall off on the right penalized slightly off line shots. The green was only 20' across the front and 60' deep.
Oh yes, this is at the far end of a 560 yard par 5. During Q School the last few years, the young bucks actually learned our usual approach shot, which was a knockdown aimed for the front of the green. Lofted approaches to the rear pins routinely bounced over, leaving difficult pitches.
Pat Mucci is right, wear was heavy, our 30,000 rounds a year saved it from being torn up.
I'm using the past tense here because the green has been torn up. Jerry Pate is planning to build a similar green, only 2700 square feet. Still small but 50% larger!
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I personally prefer smaller greens. Three putts from 60' are not unusual. At PCC, if you hit a green, you had a makeable birdie putt!