Wonderfil offers a wide selection of curated thread sets drawn from across its many product lines. The brand's threads come in a range of weights and materials suited to different sewing, quilting, and embellishment needs — from fine, nearly invisible polyester threads to rich cotton threads, variegated multi-color options, and specialty threads with effects like glow-in-the-dark, reflective, and metallic finishes.

The sets bundle together coordinated colors so stitchers can pick up a ready-made palette rather than choosing individual spools. Several focus on cohesive color themes — bright and bold combinations, soft pastels and neutrals, and nature-inspired groupings — while others are designer collaborations that reflect a particular maker's signature color sense. The collection spans a few of Wonderfil's most popular lines, including their fine bobbin thread, lightweight cotton threads in different weights, and an ultra-fine polyester thread offered in a series of coordinated packs.