Our first house had a large real stone fireplace. The house was a decent size, but not huge. I didn't like that the fireplace used up so much interior sq/ft., specially in the family room.

Is this your only living space?

How much furniture and people do you want to fit in the room?

Will the scale of the fireplace overwhelm the scale of everything else you are doing in the house?

Its the main living space, open concept, kitchen opens to living room, also main and lower hallways as there is a balcony overlooking the living room. ill attach the best pictures iv got and a rough draft of the floor plan. sizes are close but not exact

Space

Space

I love a fireplace with a lot of presence like this former design dilemma. I hope she kept that real stone.

PLEASE not stacked stone for sure. I have a stone FP in my LR it is 10' wide 4' deep and 8' tall my space is 15 x25 the FP is on the 25' wall but has wide walkways on either side . I love it , it also forms the wall in my kitchen where I have my gas range

My living room has a fireplace very close to your size, the room is 15x20' with a lower ceiling and the proportions feel fine. It looks a lot like the photo posted by Paul above. Don't go skimpy here, if you go much narrower it will look like a pole.