Shamrock Coaster - Free Crochet Pattern– Maggie's Crochet Click the banners below for more of our most popular patterns, available via mail or download! SHAMROCK COASTER FP173 Materials Needed: Worsted Weight Yarn White – 7 yds (6.5 meters) Green – 10 yds (9 meters) Yarn Needle Crochet Hook: Size F-5 (3.75 mm). Abbreviations beg beginning ch chain(s) d