Is Chewbacca (played by Peter Mayhew) taller than Goliath?
Yes. Peter Mayhew, the man inside Chewbacca, is 7’3″ (221cm), which is 7 inches (18cm) taller than Goliath.
Note: In the various manuscripts of 1 Samuel 17, Goliath’s height ranges from 4½ cubits (6’8″ or 202cm) to 6½ cubits (9’7″ or 293cm). However, the earliest manuscripts have Goliath’s height at 4½ cubits, and this was at a time when the height of your average “Israelite” would have been 3½ cubits (5’3″ or 162cm). Therefore, the manuscripts which put Goliath’s height at 6½ cubits probably reflect a later exaggeration. The “cubit” was not an exact measure, but referred to the length of the forearm – from the elbow to the tip of the finger. But we have assumed for the purposes of making this comparison that one cubit = 45cm (just under 18″).