One-sided or double-sided fireplace

We designed it like this...

Thank you! That looks very nice! Do you roughly know how much the chimney, the extension, and the fireplace (only the white body) protrude into the room?

In total, only everything "white" measures 120 cm from the inner edge of the exterior wall; the dark fire table adds another 35 cm.

Thank you for the information. I guess this recess for the wooden shelf is about 40 cm, then the fireplace body another 80 cm? But for the size, it doesn't look so bulky, probably because of the [U-shaped fireplace]. And the fireplace isn't very wide either. I find it very nice.