Backrest pillow, blue corduroy (Near Roy Cloud elem. school)

I bought this pillow from Kohl's for my son to take to college. He decided to leave it behind, so it was used for perhaps 1 week. He did, however, pull the tag off the pillow 🙄, which left a roughly 4" opening in the seam (see photo). It should be simple to stitch up or use fabric glue to close.