Working with 1/4″-wide double-fold bias tape (Part 1)

Part 1, Joining two lengths of bias tape

“Working with 1/4″-wide double-fold bias tape.” You may think that’s an overly-specific title for a tutorial but I have discovered that not all bias tape is created equal, and different widths behave differently depending on how they are sewn. I like the finished look of ¼”-wide double-fold bias tape and used it on my Monterey Bay Apron. I find it easy to handle, and I really like the way it just hugs the inner and outer curves. Here’s a close-up:

curves ahead? No problem!


I insert the raw edge of my fabric between the folded edges of the bias tape and stitch once to hold both sides down, rather than opening the tape up, stitching one side to the raw edge of the fabric and then turning it to the back and stitching again. Encasing the edge of fabric in the tape leaves a beautiful finish on both sides of the garment and is much faster than the other method. Take a look:

Encased edges. Top is right side of belt, bottom is wrong side


The process of joining two lengths of bias tape is almost identical to joining two strips of fabric for a quilt binding. Double-fold bias tape comes in a package with three folds already pressed firmly in place, however, so handling it can be a bit tricky. (I’ve made my own bias tape but find that the tight weave and the crisply pressed folds of the packaged tape make it easier to handle.)

Quarter-inch double-fold bias tape starts out an inch wide. Each long end is pressed 1/8” under and then the remaining strip is pressed in half . . . but not precisely in half. It’s pressed in such a way that one side of the tape is slightly narrower than the other (from the fold to the outside edge). The narrow side always goes on the right side of the fabric. The wider side, underneath, is always caught in the line of stitching from the top. You can clearly see that in the photo above.

Since a package of bias tape normally contains four yards, you may be wondering why it would it be necessary to join two lengths. Well, many apron patterns require more than one package to go all the way around an outside edge. Not wanting to be wasteful is another good reason. If two shorter lengths of bias tape will make a piece long enough for a specific purpose, why open another package?

1. Lay two ends of bias tape next to each other on the ironing board, narrow side up:

two ends, narrow side up


2. Press each end open about an inch and a half from the end. Don’t try to press the fold lines completely out:

End piece pressed open

A straight pin helps hold the tape in place on the ironing board.

3. Without changing the position of the strips on the ironing board, turn the ends so the right sides are up:

Right sides up

I’ve written an R on the corners with a removable ink pen to indicate the right side. You can also easily distinguish the right side by the fold lines.

4. With right sides together, lay the left strip on top of the right strip at a right angle. Overlap edges slightly as shown. This makes it a bit easier to handle, since the bias tape is only an inch wide:

Right sides together at right angle


5. Draw a diagonal line from the upper right to the lower left corner, using a pen or pencil with removable marking lines. Pin in place:

Stitching line marked, pins inserted


6. Stitch the two strips together along the diagonal line, leaving a tail at each end to keep the seam intact. Use 15 stitches to the inch or 2.0 on a computerized machine. I used a contrasting thread for illustration purposes only; thread should be matched to the color of the bias tape.

Seam sewn

Because the tape was originally cut on the bias, the diagonal seam is on the straight of grain.

7. Trim seam to a scant ¼”, being careful to leave the tails on thread. Press seam open:

Seam trimmed and pressed open


8. Trim the dog ears – but leave those thread tails on. Press all three folds back into place, using just the tip of the iron. Be very careful not to stretch or distort the length of tape.

Dog ears trimmed, folds partially pressed back in place


9. Now open the bias tape and trim the thread tails:

Thread tails ready to be trimmed


10. A final press and voila! A beautifully joined seam, ready to be sewn onto your project.

Finished bias seam


In Parts 2 and 3 of this tutorial, coming soon, I’ll show you two methods of joining the ends of bias tape where they meet on an apron.


This entry was posted in aprons, bias tape, Monterey Bay Apron, tutorial, update. Bookmark the permalink.

18 Responses to Working with 1/4″-wide double-fold bias tape (Part 1)

  1. Excellent directions. Even us non-sewers could follow easily.

  2. Peggy Kelly says:

    Wow! This looks beautiful! Nice directions, too.

  3. Anne Bender says:

    Excellent!! Thank you – now to the next lesson.

  4. Anne Bender says:

    What is the camera you are using for these excellent pictures?

    • Dawn says:

      It’s a digital Canon PowerShot, Anne, 10.0 mega pixels. The tutorial shots turned out pretty well because they were close-ups and then I cropped them. I must admit I’ve been disappointed at the lack of clarity in some of the longer shots, though. I love the convenience of a point-and-shoot but there’s a trade-off. One of these days I would like to upgrade to a better camera.

  5. […] 1 of this tutorial, joining two lengths of bias tape, is available here. Part 2 of this tutorial, overlapping ends of bias tape on an apron, is available […]

  6. Jamee says:

    This tutorial saved me! It was the only one I could understand. Thank you so much!

  7. Marta says:

    Thank you thank you thank you…after taking it out twice, I came to my computer, and your instructions and photos have saved my 2 little charity quilts. Even sewing for over 50 years I had never realized the joining seam would be on the straight…duh…me. Now I have some info to use to always get it done correctly. Thank you again for this explicit tutorial.

  8. Debi Weinert says:

    Clear tutorial – thanks. You have a remarkable number of projects – I’m eager to look at your other projects! Keep up the good work.

  9. Willa says:

    Thank you so much for these easy to follow instructions!! Now my bias tapes look professional.
    Thanks again!

  10. Marco says:

    How do you manage to be so precise with your stitching? Even with seam guide and blind hem foot my stitches would probably wobble +/- 1mm. Not to mention you are able to keep that accuracy all around the curved part. What’s the secret?

    • Dawn says:

      Hi Marco. Two things that help me be precise with my stitching are 1) using an open-toed foot, so that I can clearly see my needle going in and out right next to the folded edge of the bias tape, and 2) using a fairly small stitch length, 2.0 on a computerized machine. I go slowly and steadily around the curves. Hope that helps!

  11. Jenny says:

    I’m new to sewing finished edging. I saw similar photos regarding making your own bias tape, but it didn’t make sense. Your photos and instructions were amazing! I now understand bias tape a lot more and I’m not so afraid to attempt using it. Thanks!

  12. Duchess says:

    Thank you so very much, darlin’! Just couldn’t figure how to join doublefold readymade bias tape. You made it clear and easy. Bless you. I’m pretty new at quilting projects and everything I know I learned online from all you lovely experts who are willing to share your knowledge.

  13. Duchess says:

    Blessings on you! I searched all over YT for this one answer then googled it & found your vid. This the best instructions of ANYTHING ever done. EVER!

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