Paper, then wood, then tin
The anniversary materials are a commercial list of surprisingly recent invention.

A list sold as a tradition
The sequence feels ancient: paper for a first anniversary, cotton for a second, leather for the third, silver for the twenty-fifth. It has the authority of something handed down — a folk custom with roots too deep to question. It does not. The materials list is a commercial invention of the nineteenth century, and the version most people recognise today was largely fixed by American retailers in the twentieth.
The earliest printed references to anniversary gifts by year appear in the mid-nineteenth century in both Britain and the United States, and they are inconsistent. Some list only a handful of milestones — five years, ten, fifteen, twenty-five, fifty — without attaching materials to the years in between. The twenty-fifth as silver and the fiftieth as gold are the oldest and most stable entries, plausibly rooted in older German custom. Everything else was variable, contested, or absent altogether.

The extension of the list into a year-by-year material sequence — paper, cotton, leather, fruit, wood, sugar, wool, bronze, pottery, tin — belongs to the late nineteenth and early twentieth centuries, when gift-giving culture was expanding and gift industries were eager to give it structure. American editions of etiquette books, notably those associated with Emily Post's circle, began standardising the shorter list in the 1920s. The American National Retail Jewelers Association published an extended, forty-year schedule in 1937, attaching a material to every anniversary year and inserting gemstones alongside textiles and metals. That version — revised more than once since — is the one greeting-card companies and gift catalogues have sold ever since.

The British list differs from the American one at several points and has been revised independently. Neither version has any claim to be the older or the authentic one, because there is no ancestral ur-list from which both descend. There are only competing commercial inventions with varying publication histories.
None of this makes the custom meaningless. A couple who gives linen on a fourth anniversary is participating in something — just not something that stretches back to medieval guild practice or Victorian folk tradition. It stretches back to a trade association's committee meeting. The symbolic logic that attaches durable materials to long marriages and fragile ones to young marriages has its own internal coherence; the custom generates real objects, real gestures, and real sentiment. The history simply does not match the mythology that is routinely sold alongside the wrapping paper.