Skulls inside 707 sticker is a great way to rep the 707 area code. The 707 area code covers a large part of Northern California, and if you from or have visited Humboldt County, Mendocino County, Sonoma County, Napa County, or Solano County then you will love reppin the 707 lifestyle with this awesome sticker which has skulls inside the 707.  This sticker measures 3.5 in x 4 in. A high-quality sticker, rated for 5 years of outdoor use.