55-inch TV: dimensions in cm (width, height, diagonal)
A 55-inch TV measures 140 cm diagonally, roughly 122 cm wide and 68 cm high. Here are all the useful measurements before you buy, plus those of other sizes for comparison.
- Diagonal: 140 cm
- Screen: 122 × 68 cm (excluding bezel and stand)
- With stand: allow about 72 to 80 cm high
- Recommended viewing distance in 4K: 2.1 to 3.1 m
Short answer: a 55-inch TV has a diagonal of 140 cm (55 × 2.54). The picture measures roughly 122 cm wide and 68 cm high. The complete set is a little larger: add 1 to 3 cm for the bezel, plus the stand depending on the model.
The dimensions of a 55-inch TV
- Diagonal: 139.7 cm, rounded to 140 cm.
- Screen width: 121.8 cm.
- Screen height: 68.5 cm.
- TV width: 122 to 124 cm depending on the bezel thickness.
- Height with stand: usually 72 to 80 cm.
- Depth: 2.5 to 5 cm for a recent OLED or Mini LED, 20 to 30 cm with the stand.
On a TV unit, check the gap between the two feet: some models have feet at the ends and need a unit of at least 110 to 120 cm. Others have a central foot. We tell you for each model in store.
Table of all sizes in cm
| Size | Diagonal | Screen width | Screen height | 4K viewing distance |
|---|---|---|---|---|
| 32 inches | 81 cm | 71 cm | 40 cm | 1.2 to 1.8 m |
| 43 inches | 109 cm | 95 cm | 54 cm | 1.6 to 2.5 m |
| 50 inches | 127 cm | 111 cm | 62 cm | 1.9 to 2.9 m |
| 55 inches | 140 cm | 122 cm | 68 cm | 2.1 to 3.1 m |
| 65 inches | 165 cm | 144 cm | 81 cm | 2.5 to 3.7 m |
| 75 inches | 190 cm | 166 cm | 93 cm | 2.9 to 4.3 m |
| 77 inches | 196 cm | 170 cm | 96 cm | 2.9 to 4.4 m |
| 85 inches | 216 cm | 188 cm | 106 cm | 3.2 to 4.9 m |
| 98 inches | 249 cm | 217 cm | 122 cm | 3.7 to 5.6 m |
To work it out yourself: diagonal in cm = inches × 2.54. For a 16:9 screen, the width is 87% of the diagonal and the height 49%.
55 or 65 inches?
A 65-inch set is 22 cm wider and 12 cm taller, which is almost 40% more picture. At 2.5 m or more from the sofa, it's often the best choice. The 55-inch remains ideal at 2 m, in a bedroom or a narrow living room.
Find all our 55-inch TVs in the TV section, and our guide what size TV to choose.
Written by the TV team at the Nimestore shop in Temploux (Namur), who advise on and install televisions every day. Updated 5 November 2026.
Our most popular 55-inch TVs
OLED TV LG OLED55C64LA€1,438.00
OLED TV LG OLED55C54LA€799.00
TV QLED SAMSUNG TQ55QN80H€775.00
QLED TV TCL 55C89L€888.00
TV QLED TCL 55C6K€568.00Frequently asked questions
How big is a 55-inch TV in cm?
The diagonal is 140 cm. The screen measures about 122 cm wide and 68 cm high, excluding the bezel and stand.
What width of TV unit do I need for a 55-inch TV?
Allow at least 125 cm so the TV doesn't overhang, and check the gap between the feet of the chosen model.
How far away should you watch a 55-inch TV from?
In 4K, between 2.1 and 3.1 m. Closer, choose a 50-inch; further away, a 65-inch.
How big is a 65-inch TV in cm?
The diagonal is 165 cm, the screen about 144 cm wide and 81 cm high.
Come and compare the screens in person
At our Temploux shop, we switch on TVs side by side with your content. Or ask our expert salesperson online, right now.
Read next
Buying guideWhich TV size for your living room?The question we're asked most often in store. Good news: there's a very simple rule, and it almost always leads to a bigger screen than you had in mind.3 min read
SelectionBest 55-inch TV in 2026: our selection by budget55 inches is the best-selling size in Belgium. Here are the models we recommend in store, from budget to high-end OLED, with the type of living room each one suits.2 min read
PracticalInstalling and setting up your new TV properlyA poorly set-up TV can lose half its quality. Good news: ten minutes is enough to get it right, and we show you exactly what to adjust.3 min read