Im thinking that this may be a useful thread to start?
I would like to see a photo showing a Noctigon K1 beside a Convoy C8+ to see just how much larger it is.
Can’t help with that exactly but one option is to check out Zeroair’s reviews. In every review he photographs the review light alongside the ubiquitous Convoy S2+ (and some other common size comparisons as well). Pretty handy if he’s reviewed the light you’re interested in. Have to check specs but if memory serves the C8 hosts are about 30mm taller than the S2+.
You can see tons of comparison photos of just about every light around at 1Lumen.com if you’re curious. Big ones, little ones etc.
Zeroair: Noctigon K1 21700 Flashlight Review - ZeroAir Reviews
This video shows a lineup that includes the Sofirn C8 host (C8G here, pretty much the standard C8 size like the Convoys) in the middle and the K1 on the right end (34 seconds in): 8 SUPER Thrower 21700 Flashlights 🔦 (NOCTIGON v MANKER v SOFIRN v WURKKOS TS30S v OLIGHT v LUMINTOP) - YouTube