Our friend aloofman answered pretty well.
I can only qualify a few points.
Pills DON'T work on their own.....They might possibly contain nutrients which, when used as part of an exercise program to improve the penis (might) help a bit. But a man would be better off to buy ONLY those particular nutritional supplements which help men's genito-urinary health and save the costs of a fancy "one pill does all". Those kind of pills are a money-racket.
As to pumping....don't expect that method to give you stupendous gains either. They won't. Generally, over a (VERY) long period of time, pumping might improve girth but not necessarily too much in the length department.
And, granted, usiing a pump has helped many a man with impotency concerns. Doctors prescribed them.
However, with that said, pumping can be used as a "sideline" method now and then (or, semi-routinely) in penis enlargement along with other methods like natural exercises and some jelq. Just don't rely on pumping exclusively. Using pumping too often leads to problems....sometimes "lazy erections" (where your penis MUST be pumped to get hard). --'Don't want that.
The most reputable pump suppliers will require you to list your current size dimensions as you order your equipment (including the cylinder.) Then to get you properly started, you'll be sent a size that's right for you to begin your PE program. Generally speaking, you don't want to go beyond one-half inch over your current diameter. For example, if you measure 5.5 inches circumference, you might require a 2" diameter cylinder to begin with. Then, over time, you would next need to order say a 2.5 inch cylinder (after you reach the point of filling the tube when pumped really tightly). Some pumpers will have several different cylinders and use them in succession during a pumping routine....Use the smaller one for say thirty minutes, then switch to the next larger one for another thirty minutes. This would be "advanced" stage pumping after many,many months.
As to cylinder length...generally don't go beyond 2" more than your current erect length now. You want to fill the vacuum tube comfortably over time and not until you get extremely tight (generally speaking) would you then need to upgrade. The penis behaves rather strangely anyway while in the cylinder. When you have achieved maximum effects during a session of pumping
and then remove the cylinder, that super "extended length look" you were so proud of while in the cylinder suddenly dimenishes to some degree. You're left with a super "puffy" super "bloated" looking penis--certainly much "meatier and heavier" but all that effect too, disappears within a few hours. You get used to this...over and over and over again. With time (much of it!) subtle changes do occur in your girth....IF you don't give up. But, a man is NOT going to put on 2 inches more of girth doing this. Seems more like "fractions of an inch" over many, many months. Some guys stick with pumping, even recreationally, and report (finally) some favorable results. It will vary from man to man. It IS an awful lot of effort. Lubrication and cleaning the cylinders, "warming up" prior to the pumping sessions, etc. all take time as well.
Typically, hand pumps (good quality ones) might be within the $100 range (although custom made cylinders can run that much if you're requiring unusal fittings).
Electric pumps are more expensive but do tend to give better results---more even pumping strength, somewhat safer, more controlled pressure with built-in saftey measures (where they shut off if too much pressure is suddenly the case.).
One of the better companies for pumps is :
www.vacu-tech.com
The best PE results still seem to be from using a COMBINATION of techniques faithfully for at least a year or two. Reasonable anticipated gains range from 1 to 2 inches over time in length and about 1 inch improvement with girth. Just don't ignore the two main words....time and patience.
