Celtic Placemat [ FREE CROCHET PATTERN ] November 17, 2018 by admin GAUGE: 12 mesh = 4″; 12 rows = 4″ in filet pattern. CHECK YOUR GAUGE. Use any size hook to obtain the gauge. Link of the pattern is below! DESIGNED BY Susan Lowman Celtic Placemat [ FREE CROCHET PATTERN ] downloadable pattern is available here.