Madeira Decora Number 12 - 18 Spool Smartbox Madeira-Decora No.12 Thread Sampler. Ideal for decorative serger techniques such as flatlock, 3 threads wide, wave stitch hem and serger crochet. This package contains eighteen 330-yard spools of 100% rayon decorative serger thread in assorted colors within one 1-3/4x 10-1.3cm x 17cm storage case. Imported. Colors include: 1147 Ruby, 2091 Open Fire, 1116 Rose, 1134 Sapphire, 2093 clematis, 1132 Sky Blue, 1024 Canary Yellow, 2096 Sunrise, 1023 Lemon, 1051 Emerald, 2094 Amazone, 1047 Light Green, 1057 Copper, 2095 Cappuccino, 1082 Ecru, 1000 Black, 2099 Oyster Shell, 1001 Snow White.