Bigger than average, commercially, 6 letters
3 letters + a rower's need = packing material, 6 letters
Oversized, as mdse., 3 letters
T-shirt size: Abbr., 3 letters
First Super Bowl won by an African American coach, 3 letters
First year of Claudius's reign, 3 letters
Last year of Caligula's reign, 3 letters
Start of Claudius' reign, 3 letters
Super Bowl played at Dolphin Stadium, 3 letters
Super Bowl played in MMVII, 3 letters
Super Bowl that featured an MVP performance from Peyton Manning, 3 letters
Three years after Caesar's slaying, 3 letters
Year Caligula was assassinated, 3 letters
Year Claudius I became emperor, 3 letters
Year of Caligula's assassination, 3 letters
Year that Caligula died, 3 letters
2008 Super Bowl number, 4 letters
Old-style quarantadue, 4 letters
One year into Claudius's reign, 4 letters
Super Bowl at which Tom Petty performed, 4 letters
Super Bowl where the Giants upset the Patriots' perfect season, 4 letters
Mid-1st-century date, 5 letters
2009-10 Super Bowl number, 4 letters
Number inaugurated into this puzzle's theme answers, 4 letters
TV schedule openings, 5 letters
Big T-shirt sizes: abbr., 3 letters
Big T-shirts, for short, 3 letters
Big T-shirts: abbr., 3 letters
Bigger T-shirts, for short, 3 letters
Good-sized T-shirts, 3 letters
He-man sizes: Abbr., 3 letters
Large sizes, briefly, 3 letters
Many promotional shirts, 3 letters
Shirt sizes for Jerrold Nadler: abbr., 3 letters
Shirt sizes, for short, 3 letters
Sizes for gig buys: Abbr., 3 letters
Sizes for the hefty, 3 letters
Some automobile models, 3 letters
Some T-shirts, for short, 3 letters
Super big sizes, briefly, 3 letters
T-shirt sizes, briefly, 3 letters
45, to Julius Caesar, 3 letters
Year in Claudius's reign, 3 letters
Year Plutarch was born, 4 letters