With yarn tripled, cast on 25 stitches. Work in a wide ribbing pattern of:
Row 1: K5, P5, K5, P5, K5
Row 2: P5, K5, P5, K5, P5
Repeat until piece measures 39" or desired length for pillow size. Account for the overlap with the buttons.
Sew on the five button in the center of each of the ribbing sections, 2" from the top. Slide the buttons through the opposite end of the piece. Place the pillow inside and using the size J crochet hook and 1 strand of yarn, work 1 row of single crochet around two open sides to close the pillow.