Patterns are included for standard, queen, and king-sized shams, and for twin, full/queen, and king duvets. Be sure to allow for shrinkage and pattern matching when purchasing fabric. You'll need five 3/4" buttons for twin, eight for full/queen, and nine for king -- luckily we have a wide selection from which to choose! This is Kwik-Sew 3356.
With 54" wide fabric, Sham View A requires 1/2 yard of fabric and 3/4 yard of contrast for standard, 1 yard of fabric and 3/4 yard of contrast for queen and king. Sham View B requires 3/4 yard of fabric and contrast for each size. Duvet View A requires 4 yards of fabric and 3 7/8 of contrast for twin, 8 yards of fabric and 4 5/8 of contrast for full/queen, and 8 yards of fabric and 5 yards of contrast for king. Duvet View B calls for 5 1/8 yard of fabric and contrast for twin or full/queen, and 10 1/8 yard of fabric and 5 1/8 yard of contrast for king. Duvet View B also calls for 5 yards of piping, and Sham View B needs 1 1/4 yard.