Chasing Waterfalls Vest The Chasing Waterfalls Vest pattern is sold through Stores that carry Apple Pie yarn. Sizes: S(32"), M(36"), L(40"), XL(44"). Yarn: Apple Laine Hand Painted Apple Pie. Skeins required: S(5), M(6), L(7), XL(9). Needles: 3mm / US 2.