The complete fireplace comprises of the mantel shelf, head, combined legs and slips and A type 3 piece hearth.   Alternative  A

Alternative options are available.

Measurements:

Fire opening: 16" - 24" wide x 22" high.

Overall size of fireplace: 54" wide x 37.5" high.

Further options:

Alternative hearths: B, C, D, & E 54"

Solid fuel option are available.

Also available with no hearth