I prefer to use Omni brand thread made by Superior Threads. This thread is a durable poly-wrapped poly-core thread has a great stitch and little tension issues. This thread is considered #40 weight in thickness. If you prefer slightly thinner (#50), please let me know. I am happy to use some specialty threads (cotton, variegated, monofilament, etc.); however, an additional thread fee might be added. Color options will be limited with specialty threads.