If you decide to offer a bridesmaid proposal box, the most important thing to include is a letter or card formally asking the person to join your wedding party. Many like to include small gifts perfectly tailored to that individual, from their favorite chocolates to a scented candle they’re sure to love.
If you’ve already chosen jewelry you’d like them to wear during the ceremony, this would be an ideal time to gift it to them. If you are waiting to choose bridesmaid jewelry together, consider offering them a small keepsake to wear throughout this planning period, such as a Bezel Ring, Pavé Huggie Hoops, or an Inner Fire Medallion.