RFID tags can come in various form factors depending on use case, fixation and requirements for robustness. Typical form factors include:

    Sticky label or dry inlay

    Glass capsule

    Disc (coin shape with hole)

    Rectangular block (often with screw holes or steel ring to weld)

    ISO card

    Special form factors e.g. with built-in cable tie, tamper protection, keyfob, etc.