Q&A Lego What Is The Most Expensive Lego Set? by Sean • October 10, 2019 • 0 Comments (84 cm) long by 22″ (56 cm) wide and 8. 3″ (21 cm) tall. More from my site Are all Lego trains compatible? How do I submit a Lego idea? How long does it take to make the Lego Death Star? How long does it take to put the Lego Millennium Falcon together? How many ways can you connect two Lego bricks? Is Argos doing 3 for 2 again? How much does Lego Death Star cost? What does LEGO CMF mean?