How to Spin Seams in Quilting

When piecing quilt blocks, we often end up with several seams meeting in one spot—like in a four-patch or pinwheel block. If you’ve ever pressed a block and found a big, bulky bump in the middle, you know the struggle! That’s where spinning seams (sometimes called twirling seams or fanning seams) comes to the rescue.

Spinning seams is a simple pressing technique that helps distribute seam allowances evenly so your block lies flatter and looks cleaner.

Why Spin Seams?

• Reduces bulk at the center of your block.
• Makes quilting easier—your machine won’t have to climb over thick lumps.
• Improves accuracy, especially when matching points.
• Leaves a neat little “mini four-patch” (or pinwheel!) on the back of your block.

Step-by-Step: How to Spin Seams

1. Sew Your Block Units

Let’s use a basic four-patch block as an example. Sew your pairs of squares into two rows, and then join the rows together.

2. Press Row Seams in Opposite Directions

Press the seams in the top row to the right and the seams in the bottom row to the left. This allows the seams to nest when you sew the rows together.

 

3. Join the Rows

Sew the rows together, nesting the center seam. You’ll now have four seams meeting right in the middle of your block.

 

4. Open Up the Center

Here’s the trick: at the very center, gently unpick a few stitches from the seam allowance only. This will allow the seams to spread out. 

Click here to see my Reel in action.

 

5. Spin the Seams

Press the seams so they rotate in a circle—all clockwise or all counterclockwise. You’ll see the seam allowances “fan out,” and a tiny four-patch (or pinwheel, depending on your block) will appear in the middle on the back.

 

6. Admire Your Flat Block

Flip your block over, and you’ll see how much flatter it lies without the bulky lump in the center.

 

 

Tips for Success

• Use a hot, dry iron for crisp results. Add steam if needed.
• A seam ripper helps if you need to carefully release a few stitches.
• Practice on a simple four-patch before trying spinning seams on more complex blocks like pinwheels or stars.

 

 

That’s it! Spinning seams is such a small step, but it makes a big difference in the look and feel of your quilt top. Once you start using this technique, you’ll wonder how you ever lived without it!