Sony K77XR8B VESA pattern and wall-mount specs
The Sony K77XR8B — the 77-inch BRAVIA XR8B — uses a 300 x 300 mm VESA pattern and weighs 71.2 lb (32.3 kg) without its stand, according to Sony's product page. Any wall mount whose range covers 300 x 300 and is rated for at least 71.2 lb will hold it.
Mount checklist for the K77XR8B
- Pattern: 300 mm wide by 300 mm high (11.8 x 11.8 in). On a mount's box, both numbers must sit inside its range — "up to 400 x 400" fits this TV.
- Standard: a square Part F pattern in the VESA MIS standard, which uses M6 or M8 screws.
- Weight: 71.2 lb without the stand. Mounts are rated by maximum load; a mount rated 80 lb or more leaves no doubt, and full-motion arms should have more margin than fixed plates because the load sits further from the wall.
- Screws: use the screw length and any spacers the Sony manual specifies. Too long can damage the panel; too short strips the insert.
- Wall: fix the mount to studs or masonry with the hardware the mount maker supplies for that wall type.
What that means when you shop
300 x 300 mm sits in the middle of the range most "medium to large" mounts cover — check that the mount's largest pattern is at least 300 wide and 300 tall, because some budget mounts stop at 300 x 300. At 71.2 lb it is a heavy set: plan a two-person lift, fix the mount into at least two studs or into masonry, and pick a mount whose rating leaves clear margin.
Closest in weight among other brands' 77-inch TVs: Samsung OLED S90H (71.4 lb, 400 x 300 mm); Samsung OLED S95H (69.9 lb, 400 x 400 mm); LG OLED evo G6 (72.8 lb, 300 x 300 mm). 1 of them shares this TV's pattern.
Sony's other 77-inch models here — BRAVIA 6 OLED (400 x 300 mm, 55.3 lb), BRAVIA 8 (Not published, 71.2 lb), BRAVIA XR A95L (Not published, 77.6 lb) — all use a different pattern, so check the exact model before buying a mount.
Among Sony's 46 models here, 20 use 300 x 300 mm (51%), the most common Sony pattern. It is a 2025 model still listed by Sony.
Other sizes in the Sony BRAVIA XR8B line
Every size in this line that Sony lists uses 300 x 300 mm, so a mount for one fits the others if its weight rating covers the heaviest (71.2 lb on the 77").
| Model | Size | VESA (mm) | Weight |
|---|---|---|---|
| K55XR8B | 55" | 300 x 300 mm | 37.7 lb |
| K65XR8B | 65" | 300 x 300 mm | 49.2 lb |
| K77XR8B | 77" | 300 x 300 mm | 71.2 lb |
How it compares with other 77-inch TVs
There are 15 other 77-inch models on this site. 300 x 300 mm is the most common pattern at this size (4 of them). At 71.2 lb it is heavier than the 70.6 lb median for the size — heavier than 7 of them.
Across all sizes, 33 other TVs here use 300 x 300 mm, including models from LG, TCL — for example LG OLED77G3PUA (77"), LG OLED77G6WUA (77"), LG OLED77M3YUA (77"), LG 65QNED85BUA (65"). The 300 x 300 page lists them all.
Where to sit
A 77-inch 16:9 screen is 67.1 in wide and 37.8 in tall. It fills the SMPTE 30° view from 10 ft 5 in and THX's 40° cinema view from 7 ft 8 in. At this size 4K looks sharper than 1080p only from 10 ft or closer; beyond that, 20/20 eyes cannot tell the two apart. The 77-inch size page has the full table and every model at this size.
Pattern and weight: Sony product page for K77XR8B, checked 2026-10-20; 2025 model. Viewing distances: geometry from the angles cited on the methodology page. Not affiliated with Sony.