Well Ed, on reflection the lid would/could benefit with refine/definement, overall the dimensions are about right, but break the current form with fillets as transitions, creating defined beads, coves and more an ogee at the base, the center part is a little oversize, some would make this to reflect the main body of the form here, Bryan made this as a comment as well.
It's difficult as to what is correct in a form and we've all got an idea, it's creating it that's hard.
Cheers David