@Trigster - While I was stocking up, I bought a bunch of the little Eleaf Mini 10W mods. I
really like that they're so tiny (wonderful for stealth vaping) and that they're VV. They're also definitely the right size for putting in a shirt or pants pocket, and they only weigh 2.1 oz. without a tank on it.
I've had 3 in rotation for more than 2.5 years now, and 1 has finally gotten alittle "wonky" as far as the Mini port charging. Needs alittle fiddling with the plug sometimes to get it to start charging.
I would choose one slightly larger though, if you want a mod to put a 22mm tank on. It will extend over the front edge of the Mini 10W by about 3mm, and off each side by about .5mm. I usually use an Ego One tank, an Evod Mega tank, an Aspire K1, Mini PT3, etc. on mine.
I also have several of the Council of Vapor little Mini Volt 40W mods. Bought 4 of them on a Clearance sale on Mister E-Liquid...about 3-4 months ago. Been using 2 of them, and sadly...already 1 has gone "wonky" as far as charging it. I love them, too, though, despite 1 having a problem already! They are alittle larger than the Mini 10W Eleaf, so a 22mm tank
just does fit on it with
no overhang. They're also a pocket friendly size for sure, but since they're a 40W they do weigh alittle more...3.4 oz. without a tank on it.
Hopefully the above will help you alittle bit.