These are known as trail diamonds or trail markers by anyone who rides the trails. There true name is confidence marker because it lets you know you are still on an actual trail. They are to be placed every 1/4 mile and as you know we chase them diamonds. Now we have a miniature version so you can tag your trailer door or your sled or your helmet. Represent your favorite trail or display them for the trails you have personally conquered. They are a little under 2 inch by 2 inch about the height of a AA battery. Perfect for putting just about anywhere.