Best Fireplace Size Under a TV

Last reviewed: October 1, 2026

A practical sizing guide for choosing an electric fireplace below a TV.

The honest answer

The fireplace should usually be close to the TV width or slightly wider. If the fireplace is much narrower than the TV, the wall can feel unfinished. If it is much wider than the TV, the fireplace can dominate the room.

For most media walls, start with built-in electric fireplaces, extra large electric fireplaces, and Modern Flames.

Quick answer

Compare actual widths rather than matching the television’s advertised diagonal to the fireplace’s model name. A slightly wider fireplace is one possible visual arrangement, not a universal rule.

What matters most

Size depends on TV width, wall width, furniture layout, room scale, and whether the fireplace is wall mounted or built in. Linear fireplaces usually work best because their shape fits naturally below a screen.

For related planning, read Can You Mount a TV Above an Electric Fireplace?, Electric Fireplace Sizes Explained, and Built-In vs Wall Mounted Electric Fireplaces.

Common mistakes

The biggest mistakes are choosing only by heat output, using a fireplace that is too small for the TV, ignoring clearance requirements, and finalizing the wall before choosing the fireplace.

If this were my house

I would tape out the TV, visible flame opening, and cabinet edges before choosing a size. For a custom media wall, include cabinetry and side margins in the same layout.

Measurements to keep separate

Use this comparison to organize the design, then check the selected model’s installation documents before construction.

Measurement	What it means	How to use it
TV size	Advertised diagonal	Does not equal the overall width
TV width	Outer edge to outer edge	Use for the visual layout
Visible flame opening	Actual viewing area	Compare its proportions with the screen
Fireplace cabinet	Overall appliance dimensions	Check enclosure and installation requirements
Vertical separation	Model-specific instructions	Do not derive clearance from width

Frequently asked questions

Should the fireplace be wider than the TV?

Often, yes. Same width or slightly wider usually looks balanced.

What size fireplace is best under a 65-inch TV?

Measure the 65-inch TV’s actual overall width first, then compare candidate fireplaces in the full wall layout. There is no single fireplace width that suits every 65-inch TV installation.

Is a TV’s advertised size its width?

No. The advertised screen size is its diagonal. Measure the television’s actual overall width, including its frame, and use that measurement in the wall layout.

Should I compare the fireplace’s glass width or cabinet width?

Use the visible opening for the visual comparison and the overall cabinet and installation dimensions for the construction plan. These are different measurements and should be labeled separately.

Does matching widths establish safe TV clearance?

No. Width is a design decision. Confirm the fireplace’s installation instructions and the television manufacturer’s requirements separately before fixing the mounting heights.

Final thought

The best size is the one that fits the TV, wall, and room together. Start with proportion before choosing a model.