18th Birthday Invitation Gray and White 18th Birthday Invitation Gray and White Typography. Gray and White Background. Adult Birthday. Male Men or Women Birthday. Kids Boy or Girl Lady Teen Teenage Bday Invite. 13th 15th 16th 18th 20th 21st 30th 40th 50th 60th 70th 80th 90th 100th. Any Age. For further customization, please click the "Customize it" button and use our design tool to modify this template.