Although it is a beautiful bed, as many have stated, it is an Eastern King and this information is not provided. If you have a California King, it will take not only a conversion kit but a lot of know how to make it work. I am lucky to be married to a man who is very handy with tools and a mechanical mind. This was a full day project, with cutting and drilling of metal, but we were able to make it work. (If we had purchased locally- it would have been taken back. After a call, we were told that you must package it all up and ship back on your own dime for a return.) It is unfortunate that it does not mention that this bed is for Eastern King mattresses only. (There are measurements provided, and these were checked, but we unfortunately took it to mean there would be conversion built in.) Now that it is all put together, we love it and it it is beautiful.