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Hong Kong Seam Finish Adds Luxe

My mom used to say she wanted her garments to look as good on the inside as they did on the outside. One of my favorite ways to spiff up the inside of a garment is to use a Hong Kong, or bound seam finish. It produces a clean, polished look, is easy to sew, and depending on the fabric used, can even add a surprise splash of color or pattern to a tailored garment.

Man Displays the Inside of a Coat, Showing Seams

Crafty instructor Kenneth King displays the inside seams of a tailored coat

Best used on straight or mostly straight seams, the basic process is to encase the seam allowance with a narrow strip of bias fabric.

It looks terrific when used in an unlined coat or jacket, and is also often recommended when using a partial lining on a coat or jacket. You can make your own bias binding or purchase it, and you can apply the technique either to seams that have been pressed open or to one side (closed).

Coat with closed Hong Kong seam bound in pink

Probably the most common fabric choice for Hong Kong seams is silk charmeuse, but it is not the only option. Rayon lining, a soft cotton voile or lawn, silk organza or dupioni all could  work nicely on skirts, jackets, or other garments. The most important consideration is to use a lightweight fabric that does not add bulk to the finished seams.

In his class The Care-Free Fly Front Coat, couture designer Kenneth D. King presents excellent methods for finishing seams (including the Hong Kong seam finish) to create a garment that appears just as expertly tailored on the inside as on the outside.

Open Hong Kong seam finish

The directions below describe how to apply a Hong Kong seam finish to a seam that has been pressed open. The process is very similar for a closed seam allowance. Just press both seam allowances to one side and treat them as one, and then follow the same steps below.

Periwinkle Ambiance bias strips

1. Start by cutting bias strips 1 1/4 – 1 1/2 inches wide.

2. Join if needed to create strips long enough for the full seam length.

3. Place the right side of a bias strip against the cut edge of a pressed seam allowance, and pin in place.

Right Side of Seam

4. Stitch using a 1/4 ” or smaller seam allowance. Be careful to not stretch the bias strip as you sew.

5. Turn  the bias strip over, and press the seamline. Wrap the binding completely around the seam allowance, and baste or pin in place.

One side of seam allowance wrapped and bound - Hong Kong seam

6. Stitch in the ditch, meaning stitch right next to the “seam well” of the bias binding. You can use an edgestitch or zipper foot if you have one to help control your stitching. This line of stitching should be almost invisible

7. Trim any excess from the bias strip on the back side.

Hong Kong Finish - Completed View

8. Repeat for all seam allowances.

Because this technique totally encloses the seam allowances in fabric, any garment raveling is completely eliminated.  Not only will the inside of your garment look terrific, it will also withstand a great deal of wear with this strong and secure finish.

Have a little fun with this technique! Try a contrasting color or even a print to add a little pizazz to the inside of your garments, even if no one else will see it. Make mom proud!

Have you ever used a Hong Kong seam finish? What did you like best about it? Would you use it again?



sarah murphy

I use this finish quite a bit, especially since I tend to do a lot more backing than lining of garments, and the Hong Kong finish does finish the garment.

Tracy Hoffmann

What happens to the back edge of the seam binding that is trimmed? Doesn’t that create a fraying edge? Although it is not visible, doesn’t it have the potential to create loose threads that will migrate to the sides and front of the seam over time?


exactly! I asked the same question.

Maris Olsen

Great question, Tracy. Bias edges do not ravel, so this should not be a problem.

If you used strips that were cut on the straight of grain then indeed the raveling could be an issue. Stick to bias strips and all should go smoothly!! 🙂


I need to learn this – just purchased me machine

Maris Olsen

Congratulations on your machine purchase, Sharon. Practice on some scraps and you will be a pro in no time. Good luck!

Rose OK

Would Petersham or Ribbon work to cover the edges? If so, how wide should it be?

Maris Olsen

Ack! Definitely not. Ribbons are not woven on the bias so they will not “roll” over to the underside of the seam allowance smoothly. If you have a spare bit in your stash try it on a scrap and you will immediately see the problem.

There is a product called “silk ribbon bias” – usually hand-dyed and fairly pricey – and it would work because it is really hand-dyed silk fabric precut into ribbon strips. 😉

It is definitely worth the time to cut your own bias strips to use for Hong Kong finishing. Good luck, and thanks for the question!

Michael Elinski

In the Hong Kong seam finish above, the photo looks like there is one seam pressed open on a rather thick fabric, such as a heavy wool. Are these seams not pressed closed as in the instructions? If so, is the example showing a Hong Kong finish on each thick side of the pressed open seam allowance?

Michele White

Yes, I have used this technique, which I learned from a Sandra Betzina book some years ago. I do love it!
The rain coat looks great!


I would like to know how the back side of the seam wears since it is a raw edge? I realize you have stitched-in-the ditch already, but the back edge is still raw (rather than being encased entirely with two rolled edges.

Grammy Sews

See the above answer. Bias does not ravel. In addition, since the seam has been pressed open, there will be less wear on that unfinished edge.

The real point is that bias does not ravel.


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