Felt Sheets 3mm - 6 pieces in Colors of Your Choice – Summer-Ray.com
3mm Wool Felt // Designer Felt // Thick Wool Felt 3mm 9 X 18 100% Wool Felt Mint N Chip - Etsy
Dtydtpe Felt Board Stiff F^Elt Sheets for Crafts, 9x12 in 3Mm Thick Colored Craft Fabric Hard Pieces for Kids, Crafting, Sewing, Art Projects - Walmart.com
Green - 3mm thick felt sheet - American Felt & Craft
3mm Thick Merino Wool Felt by the Yard – feltplanet