100 years ago Emily Post wrote about etiquette and named 7 materials for Anniversaries 1, 5, 10, 15, 20, 25 and 50. Who filled in the rest of the years, who knows? 1: paper 2: cotton 3: leather 4: fruit 5: wood 6: candy 7: wool 8: bronze 9: pottery 10: aluminum 11: steel 12: silk 13: lace 14: ivory (fake) 15: crystal 16: wax 17: shell 18: sunflower 19: chili pepper 20: porcelain 25: silver (ribbon) 50: gold (ribbon) We've created 22 versions of Desk Roses for your Anniversary. They are about 7" tall and pebbles are glued into place so it's one piece. Designed to be gender neutral as a husband too will proudly display a Desk Rose on his desk - collect them all !!! $39.64 each