Could you post a picture of the board? That would help readers know more what you are looking for.
Searching: Marble, 7 inch King, Chessmen

I didn't realize I could post pictures! Here is what I have. Those are all the remaining white pieces... as you can see, it's sort of a mismatch...

What a beautiful board! Do you know the square dimensions? Also, is there something that you could put there so I could see the relative size of the board? E.g. Hand on king
BTW, 7" is huge!

Looking online, I think you're going to need some homemade pieces. I'm sure there are some people in the forums that'd do it, though.

Thank you, I have never seen another board I liked better. It is real marble set on an iron table frame, complete with matching chairs. You can imagine my horror when I picked up the box containing my white pieces and watched them fall and shatter on the tile floor. The square dimensions are 2.75 inches. I used a dollar because hand size is relative, too :) I know 7 inches is an oddly large size - the biggest I've found is 6 and they were generally themed pieces, which I don't want. Anyway, I'd love to find someone who can do a homemade set of marble pieces. Please let me know if you can help!!

Darkyvader, if I may ask, where exactly did you find such a chess set with 8-inch King?
We're not talking about the white and green-jade onyx set (which was customized into black and white onyx?) from megachess, are we? (http://www.megachess.com/White_Green_Onyx_Chess_Set_w_8_King_Chessboard_p/mq08.htm)
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I've searched high and low for a set of chessmen made of marble with a 7 inch King and have not been able to find one. I have a large, beautiful marble table and half a set of chessmen that I cannot use. Can anyone help?! Thanks!