Choosing the right thread for your quilt project

Selecting the perfect thread can elevate your quilt from lovely to truly stunning. It’s more than just color—thread weight and fiber content play a huge role in how your quilt looks, feels, and lasts.

Audition your options

Pick several threads you think might work and pull a length out.  Lay the threads out on the quilt across the different colors and values.

Color choices

Color can either blend or boldly contrast. If you want your quilting to disappear into the fabric, choose a thread that matches or is slightly lighter than your fabric. I use taupe for warm color quilts and grey for cool color quilts.  For drama and definition, go with a contrasting color. Variegated threads add movement and interest, especially on solid fabrics. If I have a range of values in a quilt, I use a medium to light value thread.  It sparkles on the darks and isn’t too stark on the lights.

Thread weight

Thread weight refers to the thickness of the thread. A lower number means a thicker thread (e.g., 30 wt), while higher numbers are finer (e.g., 50 wt or 80 wt). For most longarming projects, 40-50 wt is a go-to—it’s strong yet fine. For decorative stitching, you might opt for a heavier thread like a 30 wt to make your stitches really stand out.  For delicate, detailed work, consider 60, 80 or 100 wt thread.  This fine thread will show as texture and backtracking won’t stand out as much (such as with feathers).  60 wt thread is a great choice for the bobbin thread.

Fiber content

Cotton is a classic choice—natural, strong, and it softens beautifully over time. Polyester offers durability and sheen, making it ideal for high-use quilts or decorative stitching. It’s also great in the bobbin since it doesn’t grab like cotton can.  Silk threads glide effortlessly and add a luxurious touch, though they’re best reserved for show quilts or delicate work due to their cost.

Ultimately, the thread you choose should complement your quilt’s purpose and personality. Don’t be afraid to experiment (lime green – the new neutral!) —sometimes the unexpected choice becomes the star of the show!