China (as in porcelain) is the traditional gift for the twentieth anniversary.
Paper.
Wood is traditionally the 5th Wedding Anniversary, but in the modern symbols it is the 6th anniversary that is wood.
As far as wedding aniverseries go, they end at the 60th year known as The Diamond Wedding Anniversary.
leather
furniture
paper
furniture
porcelain
bronze
The third wedding anniversary is traditionally associated with the gift of leather. It symbolizes durability and strength in a relationship. Modern interpretations also suggest that a crystal or glass gift can be given to represent the clarity and beauty of the couple's bond.
sculpture
orchids