Understanding Thread Weight for Quilting and Sewing

Let’s talk thread weight! If you’ve ever been confused by those little numbers on thread spools, don’t worry—you’re not alone. Thread "weight" is simply a fancy way of saying how thick (or thin) your thread is. The general rule is easy to remember: smaller numbers = thicker thread, bigger numbers = thinner thread. (Don't we wish our  bathroom scales worked like that?!) 

For example, a 35-weight thread is thick and bold, perfect for making a statement on your quilt. On the flip side, a 60-weight thread is much thinner and will blend right into your quilt top, like magic!

Thread Weight Guide: What’s It Best For?

30 Weight
This is your go-to for thick, bold stitches. Want to really show off your quilting design? 30-weight thread makes sure everyone notices it!

40 Weight
When it comes to embroidery, 40-weight is the superstar. Most embroidery designs are created with this weight in mind, so it’s kind of the default for that crafty magic.

We are huge fans of Hemingworth and Glide threads, which are 40-weight!

50 Weight
The everyday hero of quilting and sewing. This thinner thread won’t bulk up your seams, which is why quilters adore it! It's also great for machine quilting, and your bobbin loves it too.

Aurifil thread is our go-to thread for all things sewing and quilting!

60 Weight
Another thin option, but even sneakier! 60-weight thread blends into your quilt like it’s playing hide-and-seek. Perfect when you want the fabric to shine more than the stitching. Also a frequent bobbin buddy.

90 Weight
The MVP of bobbin thread for embroidery. It's super thin and often comes pre-wound (yay for convenience!). If you’re working on an embroidery project, chances are you’ll find this on your bobbin.

We love using the pre-wound bobbins from Fil-Tec!

Picking the Perfect Thread

Choosing the right thread weight is like picking the perfect outfit—sometimes you want to stand out, and other times you want to blend in. Thicker thread means stronger, bolder stitches, while thinner thread lets your fabric and design take the spotlight. So go ahead and mix and match, experiment, and have fun!