- Each record contains a 5-byte header, a MAC (up to 20 bytes for SSLv3, TLS 1.0, TLS 1.1, and up to 32 bytes for TLS 1.2), and padding if a block cipher is used.
So if i understand this correctly a minimum of 5 + 20 = 25 bytes are added to the packet size, which is quite significant. And 5 + 32 = 37 bytes if TLS1.2 is used
Thanks for the help!