Disney takes safety very seriously, and they check heights using a standardized, two-step "station" procedure. At the entrance of any ride with a height requirement, a Cast Member will ask the child to stand against a permanently mounted metal post that looks like an upside-down "L" or the Greek letter Gamma. For the child to be cleared to ride, the top of their head (not their hair or hat) must physically touch the bottom of the horizontal crossbar. If the child meets the requirement at the entrance, they are allowed into the queue. However, a second check is almost always performed right before boarding the ride vehicle to ensure no mistakes were made. Cast Members are trained to be very strict; if a child is even a fraction of an inch too short, they will be denied entry for safety reasons, as the ride's restraints are engineered for specific body sizes. It is a grounded "pro-tip" to have your child wear the same shoes they will be measured in all day and to remind them to "stand up tall and proud" without standing on their tiptoes, which is an immediate disqualification.