9 stripes in the Greek flag
This is a ditloid. The answer is 9 = gallons in a firkin.
Fifth-Generation Language
8 = Pints in a Gallon
a perfect game in bowling
2 lenses in a standard pair of glasses
9 Months in a Human's Gestation Period
One Man's Loss is Another Man's Gain
"Twelve Strikes For A Perfect Game" (in bowling).
7 Wimbledon Titles for Steffi Graf
8 equals fingers on the human hand (plus 2 thumbs)
2=O in G and Y(Two O's in Google and Yahoo)
2 Lenses in a Standard Pair of Glasses2 lenses in a standard pair of glasses