The stocking is the connoisseur's format. Everything in it is unwrapped individually, held up individually, and admired individually, which makes it the one place where a very small object receives the attention a large one commands elsewhere.
Fill it accordingly. Things that are heavier, older, or stranger than their size. A coin with two centuries behind it. A carving made to live in a pocket. The most expensive ingredient in the world, by weight, in a tin the size of a thumb.