How To Square the Edges and Corners of a Quilt / Beginner Quilting
In this post, I show you how to square the edges and corners of a Quilt to prepare it for binding.
In a previous tutorial, I showed you how to place your fabric and batting onto a quilting frame. If you haven’t read that, you can find it HERE.
This trimming process works for small and large quilts and is a key skill for a beginner quilter to learn.
When I made this quilt, I used big stitches and followed the stripes in the fabric.
I added small crochet thread ties on the back of the quilt to help stabilize the layers.
That extra stitching was necessary because although the stitches were close enough in one direction, they were spaced too far apart in the other
If I’d used polyester batting, it might not have been a big deal—but with cotton batting, closer stitching is essential for durability and structure.
- For cotton batting quilts, quilting lines should generally be spaced no more than 3-4 inches apart, or even closer for quilts that are washed frequently or if you prefer a more stable, less bulky feel.
- For polyester batting, quilting lines can generally be spaced further apart than with 100% cotton batting. Some brands recommend up to 10 inches between quilting lines, but always check the specific batting’s instructions.
Always check the manufacturer’s recommendations on the batting package for specific guidelines.
Tools You’ll Need To Square the Edges and Corners of a Quilt
- Rotary cutter (preferably with a fresh blade)
- Quilting ruler (long, or square ruler for corners)
- Cutting mat
- Optional: hand weight (to help stabilize the ruler)
Step-by-Step: How to Square the Edges and Corners of a Quilt
1. Start with the Corners
It’s easiest to begin by trimming and squaring up your corners first.
When we placed the quilt on the frame earlier, we made the backing fabric slightly larger than the top. So now we need to trim off that excess.
Keep the lines parallel to your cuts if the quilt top has stripes or a printed pattern.
Pieced quilt tops may have uneven edges due to sewing all the panels together.
That’s fine—we’re going for a straight and clean edge, even if we trim a little off.
2. Use the Right Ruler for the Job
You can use:
- A 24″ x 6″ quilting ruler for long cuts
- A square quilting ruler to help with the corners
I like to start with the square ruler at the corners and then use the long ruler to connect the cuts.
3. Prep Your Rotary Cutter
Make sure your rotary cutter has a sharp, clean blade.
If it’s been a while, change it out! A dull blade can make it take longer because of having to make multiple passes to get a clean cut.
I have a separate video on how to safely change the blade and use your rotary cutter—check that out if you’re new to it.
Janni Tip:
Use a hand weight to help keep your ruler from shifting while you cut.
I like using a simple 5 lb hand weight placed on the ruler. This adds stability, especially when using the longer ruler.
4. Make Your First Cut
Line up your ruler with the edge of the quilt, just past any frayed fabric. Then, press down firmly (or use your hand weight), and make a clean cut along the edge using your rotary cutter.
If your quilt is large and the ruler is not long enough to get to the other end, just cut the length of the ruler and move on to the next corner.
5. Connect the Corners
Once you’ve trimmed the corners, use your long ruler to connect them with a straight edge.
Double-check that everything lines up nicely.
For safety, it’s best to cut away from your body, and if needed, stand up to gain better control and leverage as you make that long cut.
That’s all there is to square the edges and corners of a quilt.
Now that your edges and corners are trimmed and squared up, your quilt is ready for one of my favorite steps: adding the binding.
Stay tuned for the next video and blog post in the series, where I’ll show you how to measure, cut, and apply binding to finish your quilt beautifully.
Happy quilting!
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