According to current TSA regulations (and many international aviation standards), you can bring scissors in your carry-on luggage as long as the blades measure less than 4 inches (10.16 cm) from the pivot point to the tip. This rule is designed to allow small grooming and craft scissors while preventing the carriage of larger, potentially dangerous shears. However, it is important to note that international destinations and specific airlines may have stricter requirements; for example, many UK and European airports limit the blade length to 6 cm (2.36 inches). Regardless of the technical length, security officers have final discretion and may confiscate any item they deem a potential threat. If you are carrying specialized or expensive scissors, such as fabric shears or professional hair-cutting scissors with longer blades, you must pack them in your checked baggage. To prevent injury to baggage handlers, any sharp objects in checked luggage should be securely sheathed or wrapped. When in doubt, packing scissors in checked luggage is the most reliable way to ensure you don't lose them at the security checkpoint.