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65 vs 75 vs 86 Inch Digital Board — Which Size Should You Buy?
The single biggest mistake first-time buyers make is picking the wrong size. A 65-inch board in a 60-seat coaching room means the back row can't read the slides. Here's the size guide we use during our 8,200+ installations.
TL;DR
The single biggest mistake first-time buyers make is picking the wrong size. A 65-inch board in a 60-seat coaching room means the back row can't read the slides. An 86-inch board in a 25-seat tutorial classroom is overkill and wastes ₹85,000.
Quick rule: Measure the back-row viewing distance.
- ≤ 5 m → 65 inch
- 5–7 m → 75 inch (sweet spot — 90% of installs)
- 7–9 m → 86 inch
Size guide by use case
| Use case | Back-row distance | Recommended size |
|---|---|---|
| Classroom up to 30 students | up to 5 m | 65" |
| Coaching room 30–60 students | 5–7 m | 75" |
| Large classroom / lecture hall 60–100 students | 7–9 m | 86" |
| Online YouTube teaching studio (single teacher) | n/a | 75" (recommended for camera framing) |
| Corporate boardroom 12–20 seats | 5–6 m | 75" or 86" (premium) |
Price comparison (Smart Infovision · Benchmark series)
| Size | Price (incl. installation + 3-yr warranty) | Weight | Power |
|---|---|---|---|
| 65" | ₹85,000 – 95,000 | 38 kg | 180 W |
| 75" | ₹1,25,000 – 1,55,000 | 52 kg | 230 W |
| 86" | ₹2,10,000 – 2,75,000 | 72 kg | 320 W |
65 inch — pros and cons
Pros
- Lightest and most affordable — perfect for small classrooms and home studios
- 1-person wall installation possible
- Lowest power draw
Cons
- Back row in large rooms (50+ students) can't read fine text
- Looks under-sized in corporate boardrooms
75 inch — sweet spot
Pros
- Covers 90% of school + coaching use cases
- Fits standard 8-foot walls in Indian classrooms
- Most common size in our 8,200+ installation database
- Premium feel without 86-inch price tag
Cons
- None for typical Indian classrooms
86 inch — premium
Pros
- Maximum screen real-estate — text readable from 9 m away
- Statement piece for premium schools and corporate boardrooms
- Best for live-streamed coaching where camera captures the whole board
Cons
- Needs strong wall + 2-person installation
- 3–7 day delivery lead time outside metros
- 2× the price of 65-inch
The bottom line
When in doubt, pick 75 inch. It covers 90% of school and coaching use cases, fits standard walls, and is the most common size in our 8,200+ installation database. Pick 65" for budget or small spaces. Pick 86" for premium classrooms or 60+ student rooms.
Not sure which size fits your classroom? Smart Infovision's installation team measures your room and recommends the right size — free. [Book free demo](/contact?action=demo) or WhatsApp +91-8527926648.
