This set of cufflinks is made with aqua blue MOP guitar picks. These are made with real guitar picks. That means that the back of the guitar picks may have the emblem of the guitar pick company printed on it. I took a picture of both sides to show you what the back looks like. The pick is 1.25 inches long from the top to bottom and 1 inch at it's widest point. On the back of each pick I secured a cufflink finding. All of my jewelry and accessories are handmade by me (Bethany) or Jennifer. Made in and shipped from Lubbock, TX. USA