Figure stands for Hasbro 6" Marvel Legends figures 

PLEASE NOTE THAT THESE STANDS WILL FIT THE MAJORITY OF LEGENDS FIGURES, BUT NOT ALL. I do not have a definitive list though sorry

The stand base is 1" in diameter

These stands also fit the following figure lines - 

Kenner Star Wars vintage (1977-1985)

Kenner Teenage Mutant Ninja Turtles Vintage (1988-1997)

Kenner The Real Ghostbusters (1986-1991)

Hasbro WWF vintage (1990-1994)