The [words=http://www.mattersofsize.com/forum/penis-enlargement-forum/12539-slow-squash-jelq-nothing-give-me-better-expansion.html]slow squash jelq[/words] will work your mid-shaft girth and it's second to none for doing that. I swear by 'em. This may be the single best girth exercise without constriction that you can do. I always think of them as the "accordion squeeze"

. You can also just squeeze your base with one hand and right below your glans with the other, leaving out the squashing. I certainly recommend doing this one with a constrictor. ULIs are great for building the top part of your shaft, along with your head. I suggest doing them as a warmup without constriction and with constriction after you're warmed up. I don't like doing the Horse 440's because I hate the feeling you get when pushing blood out of my glans. I prefer to squeeze just below the glans, while having constriction at the base. This works the bottom part of your shaft.
I think you have to work all three parts of your shaft- bottom, middle and top- in order to achieve the best results. Full engorgement while doing these exercises is very important. If you ADC afterwards for 2-4 hours with either a hose clamp or
cockring, even better. Pumping once or twice a week will also help.
The key to building a fatter, more voluminous cock is blood flow. I've said this time and again. You need to expand the spongy penile tissue, as well as your circulatory system. You should rejoice when you see new veins you haven't seen before, as well as bigger veins where smaller veins used to be. That's a clear sign of progress. The same goes for the appearance of "ribs". All of the above things will help do this. Pumping may not be very effective for achieving permanent gains, but it's a very powerful tool for building bigger veins and stretching your tunica. If your tunica isn't stretched enough, it'll be that much harder for the spongy tissue beneath to be able to expand.
The best measure of penis size, in my view, is volume. The average sized cock, as defined by Kinsey at 6" EBP by just under 5" EG, is about 11.5 cubic inches. In comparison, a "big" cock of 7.5" EBP by 6" EG is 21.5 cubic inches- nearly twice as large by volume. A girl who has had both may comically say that the big cock had to be "twice as large" as the average one. In reality, that's actually true. In volume terms.
One other thing to keep in mind about volume is that each gain of a third of an inch in girth equates to a full cubic inch of growth. On the flip side, every inch of length gained equates to the same cubic inch of growth. To get mathematical on your asses, girth's importance to volume growth is exponential (because it's squared), while length's importance is linear. So, building girth is first and foremost the best way to build a bigger dick. This is not unlike an experienced bodybuilder telling someone that the best way to build a bigger upper arm is by working the tricep, not the bicep.
Try not to overdo it, though- especially with the constriction. Don't go for that extra notch if it's already very tight. You've got to keep this in mind at all times, particularly if you achieve any gains. If you used to always clamp down 7 notches, after you gained (and you probably won't even be aware of the gain), you'll only be able to do 6 notches. Don't try to force it to 7 like before. Otherwise you'll be very sad after you thrombose a vein or two. It happened to me and it wasn't pretty. In terms of my own gains, I've gone from 5.3" to 6" EG and I would say I went from 5.5->6" using mainly those SSJs. Keep doing what you're doing every day and you'll reach your goal.