Pop Charm Pack by Rashida Coleman-Hale for Ruby Star Society. Charm Pack includes 42 - 5" squares. Includes duplicates of some prints. 100% cotton. WHAT IS RUBY STAR COTTON? Ruby Star Cotton is 100% premium quilting cotton that is slightly lighter weight than most quilting cottons on the market, making it more versatile for both quilters and garment sewers alike. It has a smooth, silky finish and a soft hand. All Ruby Star Cotton fabrics are screen printed in Japan.