Look for fall-themed hair pins:

Hair Pins

For up ‘dos, half up ‘dos and even an all-down look, several bobby pins are used to secure or complete the hairstyle. Consider using bobby pins that have a decoration like a leaf at the end of the pin. It will add a finished look to your style while also holding hair in place. You can also find them in several colors so you can match your wedding colors or add an accent.