http://www.ravelry.com/patterns/library/star-wars-droid-beanies this is where I got the free pattern from. However I modified it a bit as you can see with the silver tone and I added a few more rows w/ blue single crochet and half double crochet. It just looks more like the R2D2 that way. The yarn color I choose was Blue Red Heart yarn brand. I normally like Hobby Lobby brand since it is softer but the color I wanted wasn't available. Love using Hobby Lobby's 40% off coupons.