How big is Washington Nationals rookie pitcher Stephen Strasburg?

 He’s big enough to sell out Nationals Park days in advance of his scheduled major league debut Tuesday night.

The 100-mph-fastball pitcher is big enough to catapult ad sales — and rates — on the Mid-Atlantic Sports Network for his expected starts this month.

The 21-year-old phenom is even big enough to inspire 249-year-old Strasburg, Va. to rename itself (if only temporarily) Stephen Strasburg, Va.

Simply put, expectations have soared beyond Earth’s gravitational pull and the money is already flowing — all before Strasburg throws his first big league pitch.

No one knows if Strasburg’s on-the-field performance will live up to the hype, but the Nationals are already starting to reap the financial benefits after signing him to a $15.1 million contract — highest ever for a rookie — last August.