Try http://www.versiontracker.com/dyn/moreinfo/macosx/19734&vid=116843 Seems a lot smaller than Adobe's.
"Tip: If you are asking for help to troubleshoot a computer-related problem, please be sure to include all the necessary information (ie: operating system, model number, hardware, software, etc) that will help others identify your problem for a speedy resolution."
You didn't specify an OS, but you may want to type this in Google:
small pdf viewer
Bob
I'm looking for a pdf viewer/printer.
Adobe works well but it's rather large.
Anyone recommend a small no frills view/print reader?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic