These are vintage Star Trek: The Original Series hand-painted PVC figurines produced by Hamilton Gifts in 1991. 

This set includes the complete seven-person bridge crew of the U.S.S. Enterprise:

• Captain James T. Kirk (Gold uniform)
• Commander Spock (Blue uniform, Vulcan salute)
• Dr. Leonard "Bones" McCoy (Blue uniform)
• Lt. Uhura (Red uniform)
• Chief Engineer Montgomery "Scotty" Scott (Red uniform)
• Lt. Sulu (Gold uniform)
• Ensign Chekov (Gold uniform)
• **Bonus** Tellanite Alien (Blue Outfit)

Each figure is approximately 4 inches tall and stands on a base shaped like the iconic Starfleet insignia. These were released as part of the franchise's 25th-anniversary celebration.