Download 2D Shields Free Unity. 

The 2D Shields package contains a total of 345 Shields:
Medieval: 60 models.
Cartoon: 60 models.
Chrome: 105 models.
Gold: 30 models.
Wood: 45 models
Sci-fi: 30 models
Horror: 15 models.

Single and Multiple Sprite Sheets.

The package includes demo scene + bonus source files