What is the ZigBee protocol packet size?

Total packet size of Zigbee protocol is 128 Bytes.

Without Security:
ZigBee Header: 28 bytes, Data: 100 bytes

With Networking security:
ZigBee Header: 28 bytes, Network security header: 18, Data: 82 bytes

With Application security:
ZigBee Header: 28 bytes, Network security header: 18, Application Security header: 8 Data: 82 bytes