Two sizes, A is 11 3/4” x 12 3/4”, B is 12” x 12 1/2”. B has a round of single crochet edging. Filet design is geometric, four sets of four squares with a plus sign in between them.

Matching rectangular version.

Pattern 15 in Magic Crochet.
Pattern Piezas a duo in Ganchillo Artistico.