Add a little Viking style to your favorite shawl or sweater with this gorgeous silver penannular pin! Heavy forged silver with wire wrapped detailing - this pin is meant for heavier open knit fabrics, not for fine fabrics which are too delicate. Penannular pins were common in ancient Celtic design, often forged from bronze, iron or copper. As for the meaning, penannular means "in the form of an incomplete circle"...I like that. Circle measures approximately 1.5 inch in diameter with a 3-inch pin.