I am loving the four by six, it just seems like the perfect overal size for pen sized stuff.
To wear it as a belt carry, i have short malice clips from tactical tailor. I'd probably end up making my own tacties, just because I have the gear, if I did this long term. As kind of a nice feature, if you use only the top 2 rows like I'm doing here you can stuff the bottom of the malice clip under the extra wide pals channel so it's not eating into your pants.
it's kind of hard to give a good visual description of size, the four by six is what I'd call a 'palmable' size, it's not so big that you have to to grab one side of it, but not so small that you can wrap your fingers all the way around.
next to an average sized paperback:
totally big enough to fit my lx3, which is on the big side for a compact camera.
I carry way more stuff than could fit in here, so I have it strapped to the top of a remora via the shock cord
this is what I carry in it, and still have quite a bit more room. I could carry 2 of everything here and still have a bit more extra space. The outer slip pocket is a little odd, but it has a nice feature - you can stuff the zipper pull into the corner of it to keep it from jangling as you walk.