Fabric is a wonderful choice to decorate an outdoor chair. It will add color and drama to the chair. A sheer fabric will create a more elegant look and is suitable for a wedding reception. A solid, bright fabric is perfect for a child's party. Use a narrow piece of fabric to tie around the back of the chair with a bow in the back or long flowing pieces of fabric hanging from a simple knot. The fabric can also be sewn into slipcovers to cover the entire chair. This is a good option if the color or style of chairs does not match the décor of the event. It will also create a cohesive look for all the chairs if you are using multiple styles of chairs.
Flowers can be wired onto the back or legs of the chairs with floral wire. It is important to make sure the flowers are not in the way people are sitting. Have the buds facing the back or sides of the chairs. After the flowers are wired onto the chairs, wrap ribbon around the wire to cover the wire and add an elegant look. You can use real or fake flowers to decorate the chairs. Fake flowers will last much longer and can be applied prior to the day of the event. If you are using real flowers make sure the weather is not too hot or the flowers will wilt before the event starts.
Balloons are a low-cost option to add a lot of decoration to an event. You can tie helium balloons to the backs of chairs. Make sure the string of the balloon is long enough so the balloon will not hit the head of the person sitting in the chair. If you don't have helium to fill the balloons, tape balloons to the back of the chair. Make sure the balloons do not interfere with the functionality of the chair. Use different colors of balloons. Make sure the balloons are away from any type of fire such as a candle or a fire pit.