When you're planning to gather tulle for an event, such as a wedding or party, it's essential to understand the correct ratio to use. Typically, the ratio for tulle gathering is 3:1. This means if you want a finished piece of gathered tulle that is one yard long, you would need three yards of tulle. This ratio allows for the tulle to be gathered or ruffled, creating a full and voluminous effect that's often desired for decorations, tutus, veils, and other decorative elements. Remember, the more tulle you use, the fuller your end result will be, so adjust the ratio to fit your specific needs.