Pillow in Mom's Plaid

'Knife edge' means the pillow is sewn with a sharp, crisp edge without a decorative finish.
'Ivory welt' is a decorative piping made from the plain ivory linen our patterns are printed on.
'Self welt' is a decorative piping made from the same printed, patterned linen as the pillow.
'1/2" butterfly flange' is a decorative strip of fabric from the same printed, patterned linen as the pillow that extends 1/2" beyond the dimensions of the pillow with a butterflied corner.