Superlative form of teeny: most teeny. (adjective)
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Use "teeniest" in a sentence
"Without those rookie sessions, Manning doesn't scan the field, see a Cover-2 defense, recognize that the Patriots jammed his top two receivers on the right, look off New England's safeties, slide up in the pocket and thread the ball 38 yards into the teeniest of windows for Mario Manningham for the game's biggest play."
"The launch on November 26th began "an 8½-month, 354 million-mile journey... in which NASA's six-wheeled, one-armed wonder, Curiosity, will reach Mars next summer and use its jackhammer drill, rock-zapping laser machine and other devices to search for evidence that Earth's next-door neighbor might once have been home to the teeniest forms of life.""
"Skip past conservative holdouts like Charvet and Brioni and you'll find that Burberry and Hugo Boss are making some of the teeniest collars on the market."