Payload for IP over Ethernet : IPv6 over IPv4

[Ettikan Kandasamy]

I have question/verification on IP/TCP payload size

As in RFC 1933 ( for tunneling methods ),
MTU for Ethernet is 1514 bytes and 14 bytes is for ethernet header leaves 1500
bytes for
payload.

So it looks as follows for TCP for IPv4 , IPv6 , IPv6 over v4 and IPv4 over v6

                     v4        v6        v6 over v4     v4 over v6

IP Header           20        40                    20       40
IP Payload               1480       1460                       1480
1460
         Header
(for v6 )            40   (for v4)          20
         Payload
1440                      1440
TCP header                    20              20                  20        20
TCP payload                    1460      1440                       1420
1420
Any options ...            xxx     xxx                       xxx
xxx
(Actual payload)      yyy       yyy                                        yyy
yyy


Am I right !!!

thanks in advance.

-ettikan