Amazon.com: Craft Stiff Felt Squares - 10 x 10 Inch - 36 Pack - 12 Colors, 3 of Each Color - 2mm Thick Sheets
FabricLA Acrylic Felt Sheets for Crafts - Precut 9" X 12" Inches (20 cm X 30 cm) Felt Squares - Use Felt Fabric Craft Sheets for DIY, Hobby, Costume, and Decoration | White - Walmart.com
Amazon.com: Soft Felt Squares, 4x4 Inches, 48PCS in 12 Colors - Assorted Polyester Felt Sheets for DIY, Craft, Sewing, Patches and More | 2mm Thickness - Multiple Colors and Sizes