I'm looking for a pattern for arm warmers. I want something that isn't too bulky but fits well.
Have you looked on ravelry?
What do YOU mean by arm warmers? I've seen that term used for fingerless mitts as well as something that doesn't have anything to do with fingers and just goes above the wrist. When you say which one you want we can show you more patterns.
Some are like this - http://theknittingsiren.typepad.com/the_knitting_siren/2009/10/arm-warmers.html
And some are like this - http://savvyneedle.com/yahoo_site_admin/assets/docs/Savvy_Needle_Ribbed_Stripey_Arm_Warmer_Pattern.313124542.pdf
Hithere is a free downloadable pattern at www.Lionbrand.com they are called Cashmere Arm Cosies.