The basic method: sewing three sides, turning, and closing the fourth
To sew the back of a quilt, you layer the quilt top (the pieced front), batting (the middle layer), and backing fabric (the back), then stitch three sides with right sides facing. You turn the whole thing right-side out through the opening, press the edges flat, and hand-stitch or machine-stitch the fourth side closed. This method works for quilts up to about 60 inches square; larger quilts need a different approach because turning becomes difficult.
The key is leaving an opening large enough to turn the quilt without tearing seams — usually 12 to 18 inches depending on quilt size. You also need to trim the batting close to the stitching line before turning, so the corners don't bunch and the seams stay flat.
Key Takeaways
- Layer your quilt top, batting, and backing with right sides of the fabrics facing each other, then stitch three full sides with a 1/4-inch seam allowance.
- Leave a 12 to 18-inch opening on the fourth side, centered if possible, so you can turn the quilt right-side out.
- Trim batting close to the stitching line before turning to prevent bulk at the seams and corners.
- Turn the quilt through the opening, press the edges, and close the opening with ladder stitch (by hand) or a straight stitch (by machine).
- This method works best for smaller quilts; larger quilts are usually quilted before the back is attached.
Preparing the three layers before stitching
Cut your backing fabric and batting 2 to 4 inches larger than your quilt top on all sides. This extra space gives you room to work and accounts for any shifting during stitching. Press the quilt top and backing fabric to remove wrinkles, but do not press the batting — heat can damage some batting types.
Stack the layers with the quilt top right-side down on top of the batting, and the backing fabric right-side up on top of that. The right sides of the top and back face each other, and the batting sits between them. Pin the three layers together every 4 to 6 inches, working from the center outward to avoid puckers. Use long quilting pins or safety pins placed away from where you will stitch.
Stitching three sides with the opening on the fourth
Use a 1/4-inch seam allowance and stitch all the way around the quilt, starting at one corner. Sew the first side completely, pivot at the corner, and sew the second side. On the third side, sew all the way across. On the fourth side, sew from one corner toward the center, leaving a 12 to 18-inch opening, then continue stitching from the other end of the opening to the final corner.
Backstitch at the beginning and end of each seam and at both sides of the opening to lock the stitches. Use a walking foot if your machine has one — it feeds all three layers evenly and prevents the top layer from shifting ahead of the bottom layers. Stitch slowly and check that all three layers are feeding smoothly.
After stitching is complete, trim the batting close to the stitching line — about 1/8 inch away from the seam. Trim the backing and top fabric to 1/4 inch from the seam. Clip the corners diagonally, cutting away the corner triangle without cutting into the stitching. This reduces bulk when you turn the quilt and helps corners lie flat.
Turning the quilt right-side out and pressing
Reach through the opening and gently pull the quilt top through. Work slowly and use your fingers to guide the corners out first — corners are the hardest part and the most likely to tear if you rush. Once the quilt is mostly turned, reach back through the opening and pull the rest of the fabric through until the quilt is completely right-side out.
Press the edges of the quilt with an iron, paying special attention to the seams. Use a pressing cloth (a thin cotton cloth placed between the iron and the quilt) to protect the fabric. Press the opening edges inward by 1/4 inch so they are ready to close. Let the quilt cool completely before moving it.
Closing the opening by hand with ladder stitch
Ladder stitch (also called whip stitch) closes the opening invisibly. Thread a needle with thread that matches your backing fabric. Knot the end and bring the needle up through the fold of the backing fabric at one end of the opening, so the knot hides inside the fold.
Slide the needle along inside the fold for about 1/4 inch, then bring it back out and cross directly over to the opposite fold. Slide the needle inside that fold for 1/4 inch, then come back out and cross back to the first side. Continue this pattern — in and out of each fold, crossing over the opening — until the opening is closed. The stitches will be nearly invisible from the front. Knot off inside the fold at the end.
Closing the opening by machine as an alternative
If you prefer a machine stitch, fold the opening edges inward by 1/4 inch and press them flat. Pin the opening closed so the folds are even. Use a straight stitch and sew as close to the fold as possible, about 1/8 inch from the edge. This creates a visible seam line, which some quilters prefer because it is fast and durable.
You can also use a ladder stitch foot (available for some machines) to machine-stitch the opening closed with a stitch that mimics hand ladder stitch. Check your machine's manual to see if this foot is available for your model.
When this method does not work: larger quilts and alternatives
Quilts larger than 60 inches square are difficult to turn through an opening because the weight and bulk of the fabric make it hard to maneuver. For large quilts, the standard method is to attach the backing after quilting is complete. Quilt the top and batting together first (with the backing left off), then attach the backing to the sides of the quilt using a binding or a separate backing seam.
Another option for any size is to use a bagging method: sew the top and back together on three sides, turn it right-side out, insert the batting through the opening, then close the opening. This avoids having to turn a thick, quilted sandwich, but it requires careful insertion of the batting and can result in uneven batting placement.
Frequently Asked Questions
Can I quilt the quilt after I close the back?
Yes. Many quilters close the back first, then quilt through all three layers using a walking foot and a straight stitch or free-motion quilting. This is called stitch-in-the-ditch quilting when you stitch along the seams of the pieced top. Start quilting from the center and work outward to avoid puckers.
What if my opening seam rips when I turn the quilt?
Stop turning when ready and reinforce the seam by stitching over it again from the outside, using a short stitch length. If the tear is small, you can often continue turning carefully. If the tear is large, you may need to hand-stitch the opening closed without turning, which will leave the quilt inside-out — not ideal, but the quilt is still usable.
How do I prevent puckers when I stitch the three sides?
Use a walking foot, pin every 4 to 6 inches, and stitch slowly. Check frequently that all three layers are feeding evenly. If you see puckering starting, stop, remove the pins ahead of your stitching, smooth the layers, and repin before continuing.
Should I trim the batting before or after turning?
Trim the batting before turning. Trimming after turning is harder because the layers are already sewn together, and you risk cutting through the top or back fabric by accident. Trimming before turning also reduces the bulk you have to push through the opening.
What size opening do I need?
For a quilt up to 40 inches square, a 12-inch opening is usually enough. For quilts 40 to 60 inches, use 15 to 18 inches. Larger quilts need a different method. Center the opening on one side rather than placing it in a corner, because corners are harder to turn and more likely to tear.