This is a set of two napkins. The first one draws inspiration from dwarven patterns made by the Hobbit's and Lotr's artistic team. It shows dwarven plate armor elements. The technique is a tad shaky because of the uneven surface: it is indeed completely round whereas the drawing should give off a rather square and dry impression. The center plates are designed in order to show battered areas, drawn in irregular, tight-fit brushes. Their sides, however, in clear white (or natural wood), are meant to look cleanly polished. 

"Hidden" in the armor elements is the key to Erebor which King Thorin Oakenshield always keeps on him

The second ring focuses on more natural themes such as a woodman. The face blends in with the wilderness.