Making a pillow from a vintage towel

I bought this vintage towel at a flea market years and years ago. It's been sitting with many other vintage linens and lace in my hall closet. I finally decided to make it into an envelope style pillow last weekend. It's just folded in thirds, a seam up the sides on the bottom half and a button closure. I then made a pillow insert to go inside (this is when my sewing machine decided to die and