Threads Logo Threads Logo Facebook Email Pinterest Twitter Instagram YouTube Icon Headphones Icon Favorite Navigation Search Icon Forum Search Icon Main Search Icon Close Icon Video Play Icon Indicator Arrow Icon Close Icon Hamburger/Search Icon Plus Icon

Sign in or become an insider to access this story

Sign In

Get Rid of the Fabric Bump Above a Mock Fly Zipper

Article Image

Sometimes, no matter how hard you try, there’s an area on a garment you’ve made that just doesn’t look the way you intended. You followed the pattern, made sure all the seam allowances were accurate, but it’s still there. No one would ever notice, but you know it’s there and it bugs you. You’re not alone. After installing a mock fly zipper, I would always get a little “bump” in the fabric just below the waistband.

The following tiny fix solved the problem for me. I know I’m obsessed, but I was much happier after applying my solution.

I’ll walk you through installing a mock fly zipper, to show the bump afterward. Then you’ll see my tiny fix to solve the issue.

Install the mock fly zipper

1. Use tailor’s tacks to indicate the mock fly extension, center-front, and the shape…

Start your 14-day FREE trial to access this story.

Start your FREE trial today and get instant access to this article plus access to all Threads Insider content.

Start Your Free Trial

Sign up for the Threads eletter

Get the latest including tips, techniques and special offers straight to your inbox.

Sign Up

Threads Insider

Get instant access to hundreds of videos, tutorials, projects, and more.

Start Your Free Trial

Already an Insider? Log in

Subscribe to Threads today

Save up to 42% and get a free gift



  1. user-7035420 | | #1

    Question. At what point are you cutting off the top of the zipper?

  2. User avater
    pamhoward | | #2

    Hi, I wait until I’ve sewn the waistband across the top. This will prevent any chance of the zipper pull coming off. Many years ago, I installed a zipper and cut the excess from the upper end before applying the waistband or waist facing. I zipped it up and the zipper pull kept going off of the zipper... not fun to replace it!

  3. User avater
    RC_793081 | | #3

    Thank you so much Pam. I really love the beautifully polished effect without the bump and I will try to incorporate this tip in my future sewing.

    1. User avater
      pamhoward | | #5

      You’re very welcome!

  4. OsewViolet | | #4

    What causes the bump in the first place? Does the fabric stretch during the zipper installation?

    1. User avater
      pamhoward | | #6

      Hi, even though you stabilize the fabric, it does still have a tendency to “grow” a little bit there. That little adjustment has always worked for me :-)

Log in or become a member to post a comment.

More From Threads

Discussion Forum

Recent Posts and Replies

  • |
  • |
  • |
  • |
  • |
  • |

Threads Insider Exclusives

View All
View All

Shop the Store

View All
View More