Gardening grade burlap adorned with a bow-tie quilting square and large white rick rack over embroidered with the colors in the square.  The decoration is all vintage - down to the pearl cotton used in the embroidery.  The cover is an envelope style closing in the back with two large snaps and three red plastic buttons from the 1960's.  I lined the envelope flap with a charming fabric remnant I found in my Mother's sewing supplies - 1970's.  You are looking at re-purposing writ large.  The pillow comes with the poly-fil form and measures 14" square.

The form is washable.  However, I would dry clean the cover.

As an aside, I have a table cloth that matches the patterned fabric in the square.