Photo via Unsplash
You've decided on OLED. You know which model you want. Now you're stuck on the size.
55 inch feels safe. 65 inch feels like a lot. But "a lot" in the shop and "a lot" at home from your sofa are very different things.
Here's the definitive answer on which screen size you actually need — based on your room, your sofa position, and what you're watching it for.
The Simple Rule: Viewing Distance Decides Everything
The right TV size for your room is determined almost entirely by how far away you'll be sitting. Too close and a large screen is uncomfortable to watch. Too far and you're losing the 4K detail that justifies spending £1,000+ on an OLED.
Here are the recommended viewing distances for each screen size, based on 4K resolution:
| Screen Size | Minimum Distance | Ideal Distance |
|---|---|---|
| 43 inch | 1.1m | 1.1–1.8m |
| 55 inch | 1.4m | 1.4–2.1m |
| 65 inch | 1.6m | 1.6–2.4m |
| 75 inch | 1.9m | 1.9–2.9m |
| 85 inch | 2.2m | 2.2–3.3m |
Measure the distance from where your sofa sits to where the TV will be. That number tells you your ideal screen size.
What Most UK Living Rooms Actually Need
The average UK living room puts a sofa somewhere between 2 and 3 metres from the TV wall. That range sits perfectly in the ideal zone for a 65-inch screen.
This is why most TV reviewers, when they're being honest, say that 65 inches is the right size for most UK living rooms. The 55-inch feels right in the shop — because you're often standing 1.5 metres away. At home from your sofa at 2.5 metres, the 55-inch starts to feel modest.
The jump from 55 to 65 inches is significant in practice. The screen area increases by 40%. Sports, in particular, look dramatically better on a 65-inch because you can actually see the ball, read the scoreline, and follow play across the pitch without squinting.
55 Inch — The Right Choice When:
- Your sofa is less than 2 metres from the TV
- The room is genuinely small (under 12m²) and a 65-inch would dominate
- Budget is the priority — the same model in 55-inch costs £200–400 less than 65-inch
- You're bedroom mounting or using it as a second TV
65 Inch — The Right Choice When:
- Your sofa is 2 metres or more from the TV — which covers most UK living rooms
- You watch sport, films, or anything where screen presence matters
- You're buying a TV to last 5–7 years — you won't regret going bigger
- More than one person watches together — wider viewing angles are better used on a larger screen
The World Cup Argument for 65 Inches
A football pitch is 100 metres long. On a 55-inch screen from 2.5 metres away, the players are thumbnails. On a 65-inch screen from the same distance, the game opens up. You can see the shape of play, anticipate the run, spot the foul before the referee does.
England's first game — vs Croatia on 17 June at 9pm BST — is on a free-to-air channel. You just need the screen to do it justice.
LG C5 65-inch OLED 4K — 2025 Model
★★★★★ 4.6 / 5 · 1,430 reviews
£1,599.00
Check Price on Amazon UK →One More Thing — Your Sofa Position Matters Too
The viewing distance calculation only works if your sofa is actually in the right place. A 65-inch TV with your sofa pushed against the back wall at 4 metres is technically too far for 4K detail to register fully. A sofa at the right depth in the room — around 2–2.5 metres from the screen — is the sweet spot.
If you're rethinking your living room setup around a new TV, it's worth looking at your sofa at the same time. A deeper sofa (90–100cm depth) at the right viewing distance is far more comfortable for long matches than a shallow sofa you perch on. At Revived Sofas every sofa is listed with full dimensions — depth, width, height — so you can plan the whole setup before you buy.
Browse preloved sofas at Revived Sofas →
This post contains Amazon affiliate links. If you buy through a link on this page we may earn a small commission at no extra cost to you.