Approximately 8.5" tall.
Originally a Star Wars Celebration V exclusive, Sideshow also sold it separately on behalf of Medicom.
From a retailer:
Sideshow Collectibles is proud to bring Medicom Toy Corporation's line of high-quality Vinyl Collectible Doll (VCD) Star Wars figures to Star Wars Celebration V Non-Attendees! Medicom has designed the VCD line with the serious Star Wars collector in mind, realizing each character accurately and faithfully. This Boba Fett VCD figures is a Star Wars Celebration V Exclusive, previously only available to Celebration V Attendees - don't miss this opportunity to add the Mandalorian bounty hunter to your collection!