- Quilting fabric by the yard.
- Premium 44 Inch wide cotton flannel fabric.
Robert Kaufman Fabrics Mammoth Woven Cotton Flannel Cobalt Box Plaid. Mammoth Flannel by Robert Kaufman Fabrics features soft and plush 2 ply flannel plaids. Premium 44 inch wide cotton woven plaid quilting fabric by the yard. 6.4 ounces per square yard.