SoftShell for Acer Chromebook 11 C720 – Gumdrop Cases
mCover® for Acer C771 Chromebook - iPearl mCover® Hard shell case for 11.6-inch Acer Chromebook 11 C771 series Chromebook Laptops
Amazon.com: iPearl mCover Hard Shell Case for 11.6" Acer Chromebook 11 CB3-111 Series (NOT Compatible with Newer Acer CB3-131 Series with IPS HD Screen) Laptop (Aqua): Computers & Accessories