Good afternoon,

With every order we send a total of five filler panels, 2 large (52" x 13" x 1-1/2") and three small (52" x 7-1/2" x 1-1/2"). Once the optional mantel shelf has been added to the Nova surround your overall mantel width will be approximately 78-3/4" wide, and the depth will be 9-3/8". Please be aware that since we have not officially released the optional mantel shelf, these dimensions may change slightly.

Please feel free to contact us with any other questions, we are always happy to help.

Thank you. I need to know the surround dimensions, width on all three sides without filler an hearth dimensions. Also, what are the hearth stone dimensions?