Whether she’s your sister by family or sorority, these cards are perfect for asking your girls to be a part of your wedding party! The front of the card reads “I found my mister but still need my sister” and “will you be my (title of choice)” is printed on the inside. Add an accent of color with your choice of envelope. Shown here with navy, lilac and lagoon envelopes, view the last image to see all available shimmer envelope colors. .