They’re big enough that full names aren’t even needed. As the Post’s Legends Mania begins its semifinals today, the marquee matchup is simply: LT vs. the Babe.

Babe Ruth, who defeated Lou Gehrig in the Round of 8, and Lawrence Taylor, who sacked Joe Namath in the same round, will clash for the right to play for the title.

Two Garden greats will meet in the second semi, as Walt Frazier, an easy winner over Julius Erving, takes on Mark Messier, who knocked out Joe Louis. Now comes your part. Vote for your favorite Legends today on nypost.com.

The championship final begins on Saturday.