I dunno how big COBRA would be, toy wise I'm in agreeance with Lava Boss :)

From a hypothetical standpoint, I'd figure COBRA has probably 40 000 full fledged soldiers globally, but the number is probably tripled in terms of supporters (be it through donations, dudes who bought into pyrimad schemes, and those who'd be willing to die for the COBRA cause)

as for Vehicles, I'm not to sure, a lot of the stuff seems designed for Mass production

Same here.

My COBRA is a nation based on Cobra Island and the main product of the country is mercenaries. Cobra Commander sells his soldiers to fight like a Private Military Contractors. And it is a BIG army, most like you think yours Craig.

It's a tricky question. You sort of have to freeze the timeline at some point. There's grassroots Cobra, with factions in most major cities (e.g. Springfields), then there's Empire Cobra, with legions of specialized Vipers (Air Viper, Eels, Eels v2, Snow Serpents, Ice Vipers, Toxo-Zombie-Vipers...), then there's Cobra post-Civil war which, while still Cobra, is fractured.

In my mind, Cobra has far more "civilian" members than actual soldiers. But then, I guess Crimson Guards under cover are still soldiers after all. Since their kids tote machine guns, might as well count them in with the soldiers. But the question still remains: is Cobra on the rise or diminishing? My Cobra collection is still in its beginnings (2 HISSes, a handfull of Troopers and very few specialized Vipers). But a Cobra at its height would easily be 500k-1mil including all it's low-grade troops (and families).