Sofirn SC31 Pro vs Sofirn SC33 size comparison
The Sofirn SC33 is 13.5 mm (0.53 in) longer than the Sofirn SC31 Pro, and 6.6 mm wider at its widest point. It is 51 g heavier (without battery).
The Sofirn SC33 is 13.5 mm (0.53 in) longer than the Sofirn SC31 Pro, and 6.6 mm wider at its widest point. It is 51 g heavier (without battery).
Dimensions
| Sofirn SC31 Pro Check price ↗ | Sofirn SC33 Check price ↗ | |
| Length | 117.5 mm (4.63 in) | 131 mm (5.16 in)+13.5 mm |
| Head / width | 25.4 mm (1.00 in) | 32 mm (1.26 in)+6.6 mm |
| Weight | 59 g without battery | 110 g without battery+51 g |
| Battery | 18650 | 21700 |
| Max output | 2,000 lm | 5,200 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Price | not verified yet | from $41.99 at flashlightgo.com, as of Nov 4, 2026 |
| Source | sofirnlight.com sourced Only head diameter listed | flashlightgo.com sourced Only head diameter listed |
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SC31 Pro vs SC33: how they differ
Size and weight
The Sofirn SC31 Pro is the shorter light: 117.5 mm (4.63 in) against 131 mm (5.16 in), a difference of 13.5 mm (10%). At its widest point the Sofirn SC31 Pro is 6.6 mm slimmer (25.4 vs 32 mm). The Sofirn SC31 Pro is 51 g lighter (59 g vs 110 g, without battery).
Brightness and throw
The Sofirn SC33 is rated brighter: 5,200 lm maximum vs 2,000 lm for the Sofirn SC31 Pro, 160% more.
Battery
The Sofirn SC31 Pro runs on a removable 18650 battery; the Sofirn SC33 runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Sofirn SC31 Pro if you want a shorter light (13.5 mm shorter), a slimmer profile (6.6 mm narrower) and less weight (51 g lighter). Choose the Sofirn SC33 if you want more output (5,200 lm vs 2,000 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Sofirn SC31 Pro Check price ↗ Sofirn SC33
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SC31 Pro vs SC33 FAQ
Which is smaller, the Sofirn SC31 Pro or the Sofirn SC33?
The Sofirn SC31 Pro is the shorter light: 117.5 mm (4.63 in) against 131 mm (5.16 in), a difference of 13.5 mm (10%). At its widest point the Sofirn SC31 Pro is 6.6 mm slimmer (25.4 vs 32 mm). The Sofirn SC31 Pro is 51 g lighter (59 g vs 110 g, without battery).
Which is brighter, the Sofirn SC31 Pro or the Sofirn SC33?
The Sofirn SC33 is rated brighter: 5,200 lm maximum vs 2,000 lm for the Sofirn SC31 Pro, 160% more.
Do the Sofirn SC31 Pro and Sofirn SC33 use the same battery?
The Sofirn SC31 Pro runs on a removable 18650 battery; the Sofirn SC33 runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Compare Sofirn SC31 Pro with similar lights
Compare Sofirn SC33 with similar lights
More
Sources
- Sofirn SC31 Pro: specs from manufacturer published specs as listed by sofirnlight.com. No verified price yet.
- Sofirn SC33: specs from manufacturer published specs as listed by flashlightgo.com. Price from $41.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
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