This is a loose knit one size fits all bulky weight cap.  This one came out a bit bigger so would probably be too big on a size small.  The ribbed brim and crocheted bobbin are both a blend of undyed Romney wool and New Zealand opossum down.  The gray ribbing in the center of the hat is dyed Shetland wool.  The topmost section is more of this slightly darker gray contrasting with the lighter bobble.  The two grays are close in color but different enough to provide some subtle contrast.  The dark brown is undyed Romney wool.  The beige/gray brown in the bottom and top lumpy sections is a blend of several undyed wools and white mohair.  The warm brown is dyed Corriedale wool.  The bits of green/gray/brown is undyed gray Icelandic wool plied with green and brown Merino wool.  This is a very soft, comfortable hat.