How about the KangerTech Subvod Kit? I just got several 2-3 weeks ago, and have been using one in rotation with my other mods and
tanks since then. I really like it so far.
The kit includes:
(1) TopTank Nano tank
(1) Subvod Battery (1300mAh capacity)
(1) SSOCC 0.5 SubOhm coil
(1) Spare Pyrex Glass
(1) Micro USB Cable
(1) Manual
Comes in a variety of colors including: Black, Red, Silver, Blue (really a turquoise), and Purple.
It's 18.5mm in diameter and not counting a drip tip on top...it's 13.5cm long.
The TopTank Nano is a topfill tank, so very easy to refill. The US version of the tank holds 3.2mL, while the European version holds 1.9mL. It also has a rotating airflow control, so you can get just the right amount of air for the type of
vaping you like to do.
It recharges through the Micro USB port on the bottom of the battery. It has shortcircuit protection, as well as over charge and over use protection, too.
I don't subohm vape at all, so I just bought several boxes of the SSOCC coils that are 1.5ohms. They also make them in 0.2ohms, 0.5ohms, and 1.2ohms, but the coil resistance recommended
is above 0.4ohms, so I wouldn't use the 0.2ohm ones in it at all.
I'm not sure how it compares in size though, to those you tried. I didn't look up their diameters nor lengths.