There are no specific height restrictions for pilots under FAA rules. Flight schools and commercial airlines accept pilots for training as long as they are physically able to reach the controls and obtain a full rudder deflection in the aircraft they will operate.

Yes, you can absolutely be a pilot at 5'3" (160 cm). In civil aviation, the FAA and other international bodies do not have a strict minimum height requirement. Instead, the "requirement" is functional: you must be able to reach all the controls (including the rudder pedals) and have a clear line of sight over the instrument panel. Most modern commercial aircraft, like those from Boeing and Airbus, feature highly adjustable seats and rudder pedals designed to accommodate a vast range of body types, typically from about 5'2" to 6'3". Shorter pilots often use seat cushions or "booster" pads to ensure they have the proper visibility. The only area where 5'3" might be a challenge is in military aviation, where cockpit dimensions for fighter jets are much more restrictive due to ejection seat safety parameters; however, even in the military, height waivers are frequently granted for candidates who can pass "reach" tests.