Jewelry can be custom made to specifically commemorate 31 years. Consider a pendant in the shape of the number 31, a bracelet or ring with 31 gems or a pair of earrings in the design of the number 31. You can have the number 31 engraved on a piece of jewelry such as an anniversary band, a pocket watch or a locket with the couple's wedding picture inside.

You can throw an anniversary party with the theme of 31. This can include 31 guests, a cake with the number 31 written in the icing, 31 balloons, 31 flowers, 31 bottles of champagne, 31 pictures of the couple throughout the years, 31 different hors d'oeuvres, and even 31 gifts.

There are a variety of gifts that can be personalized to commemorate a 31-year anniversary. This can include a silver picture frame with the number 31 in the design, t-shirts with the couple's picture and the number 31, crystal what-knots or crystal vases with engravings of the number 31 or even an embroidered pillow or wall hanging with the phrase "31 Years Together" and the date.

Flowers are another gift option that can specifically be arranged to mark a 31-year anniversary. This could include a bouquet of 31 roses, 31 daisies, 31 violets or any other type of flower in an arrangement of 31. The container or vase could also be engraved with the number 31, or decorated with 31 ribbons or colored balloons.