SAVITA 5pcs 25.4 x 22.8cm/10 x 9 inch 3mm Thick Felt Sheets, Stiff Felt Fabric Sheets for Crafts Hard Felt Squares for Sewing Crafting Cushion and Padding (Black) : Amazon.co.uk: Toys &
Jtnohx Stiff Felt for Crafts, 2mm Thick Colour Felt Sheets, 8 Pcs 20x30cm Craft Felt Fabric for Sewing & DIY Projects (Black) : Amazon.co.uk: Toys & Games
Medium Density Black Industrial Felt 9mm Thickness| Felt Products| Provincial Rubber UK