Filet and popcorn stitch coaster. 50 yd for coaster. Also uses brick (block) stitch.

Pattern 24 in Decorative Crochet has multiple designs that coordinate. Coaster is pattern 24/5 on p. 54, photo bottom right p. 57, of Decorative Crochet.

Pattern Carre d’Ete in 1000 Mailles, pp 18-23 for the set, coaster on p. 23.