What is the size of boarding pass?

The size of a boarding pass can vary depending on the airline and format (paper or electronic), but a standard paper boarding pass typically measures around 6 inches by 2.5 inches (15 cm by 6.5 cm). Electronic boarding passes, displayed on mobile devices, do not have a fixed size but are designed to fit screen dimensions for easy scanning at the gate. Ultimately, the design may differ, but the functional aspects remain similar across airlines.