For Guardians of the Galaxy: Cosmic Rewind at EPCOT in Walt Disney World, the height requirement is 42 inches (107 cm). This is a high-value technical detail for families, as it is slightly taller than the 40-inch requirement for Big Thunder Mountain but lower than the 48-inch requirement for Rock 'n' Roller Coaster. Because the ride features a "reverse launch" and high-speed rotating ride vehicles, Disney strictly enforces this limit for safety. If your child is close to the mark, be aware that Cast Members will measure them both at the entrance and right before the loading platform. A peer-to-peer tip for 2026: if you have a child who doesn't meet the height, utilize the Rider Switch service; this allows one parent to wait with the child while the other rides, and then they swap places without the second parent having to wait in the full Virtual Queue or Lightning Lane again.