Convoy M21B vs Wurkkos FC12C size comparison
The Wurkkos FC12C is 5 mm (0.20 in) shorter than the Convoy M21B, and 11.7 mm narrower at its widest point. Weights are published on different bases (listed (battery unspecified) vs listed), so compare them with care.
The Wurkkos FC12C is 5 mm (0.20 in) shorter than the Convoy M21B, and 11.7 mm narrower at its widest point. Weights are published on different bases (listed (battery unspecified) vs listed), so compare them with care.
Dimensions
| Convoy M21B Check price ↗ | Wurkkos FC12C Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 136.5 mm (5.37 in)−5 mm |
| Head / width | 35.7 mm (1.41 in) | 24 mm (0.94 in)−11.7 mm |
| Body | 27.1 mm (1.07 in) | — |
| Weight | 120 g listed | 85 g listed (battery unspecified) |
| Battery | 21700 | 21700 |
| Max output | — | — |
| Throw | — | — |
| Type | EDC | EDC |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | $35.99 at flashlightgo.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | flashlightgo.com sourced Only head diameter listed |
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21B vs FC12C: how they differ
Size and weight
The Wurkkos FC12C is the shorter light: 136.5 mm (5.37 in) against 141.5 mm (5.57 in), a difference of 5 mm (4%). At its widest point the Wurkkos FC12C is 11.7 mm slimmer (24 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Wurkkos FC12C: 85 g listed (battery unspecified)), so they are not directly comparable.
Brightness and throw
Output for the Convoy M21B depends on the LED option chosen.
Battery
Both run on a removable 21700 battery, so spare cells work in either light.
Price
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Wurkkos FC12C $35.99 at flashlightgo.com, so the Wurkkos FC12C cost $13.00 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Wurkkos FC12C if you want a shorter light (5 mm shorter) and a slimmer profile (11.7 mm narrower). On the specs we track, the Wurkkos FC12C is ahead or level everywhere; the Convoy M21B makes sense mainly if its price, interface or a feature we don't track suits you better. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Convoy M21B Check price ↗ Wurkkos FC12C
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21B vs FC12C FAQ
Which is smaller, the Convoy M21B or the Wurkkos FC12C?
The Wurkkos FC12C is the shorter light: 136.5 mm (5.37 in) against 141.5 mm (5.57 in), a difference of 5 mm (4%). At its widest point the Wurkkos FC12C is 11.7 mm slimmer (24 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Wurkkos FC12C: 85 g listed (battery unspecified)), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the Wurkkos FC12C?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Wurkkos FC12C $35.99 at flashlightgo.com, so the Wurkkos FC12C cost $13.00 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and Wurkkos FC12C use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Convoy M21B with similar lights
Compare Wurkkos FC12C with similar lights
More
Sources
- Convoy M21B: specs from manufacturer published specs as listed by flashlightgo.com. Price $48.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
- Wurkkos FC12C: specs from manufacturer published specs as listed by flashlightgo.com. Price $35.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
Found an error? Email [email protected] and we will fix it.