What is the max amount of bytes you can send in a Ping before it is considered illegal?

The maximum amount of data that can be sent in a standard ICMP Echo Request (Ping) packet is typically 65,527 bytes, which includes the IP header and ICMP header. However, the usual maximum payload size is 65,507 bytes, since 20 bytes are reserved for the IP header and 8 bytes for the ICMP header. Going beyond this limit would result in fragmentation or may not be processed correctly by the receiving system, but it is not inherently "illegal." It’s essential to adhere to network policies and regulations regarding packet sizes to avoid issues.