These 3 geocaches can be extremely difficult to find depending on placement. This listing is for; 1 Tree Bark Geocache. The tree bark measures approximately 1 inch by 1 inch. 1 White Bottle Cap Geocache. The bottle cap measures approximately 1 1/8 inches in diameter. 1 Sandstone Rock Geocache. The sandstone rock measures approximately 1.5 inches by 1.5 inches. Only your imagination limits the placement of these geocaches. To use these geocaches just make a small half inch wide hole in the ground with a stick or screwdriver. These can also be placed on fallen trees. Just insert into small holes or crevices or drill a 1/2 inch wide hole in the tree trunk or limb. The water proof plastic geocache container measures 1-5/8ths inches long by 3/8th inches wide and is securely attached to each item. Each geocache comes complete with a geocache log.