This site is a home for Colette Patterns sewalongs, which were published between 2011 and 2017. This site is no longer being updated, but you can find more tutorials and new video classes every month by joining Seamwork.

How To Install Magnetic Snaps


Today, we’re going to show you how to install a magnetic snap in your Cooper bag, or any other project that calls for them.

We’ll be showing the male side of the snap, but you can use the same steps to install the female side.


Step 1: Transfer magnetic snap | markings to the right side of flap (C) piece, and check to make sure they fit your snap. Every snap is different, so if you need to move the two markings closer together or further apart, go ahead and do it.


Step 2. Using scissors, cut small slits along the straight lines within the magnetic snap | markings on the right side of one flap (C) piece.


Step 3: Reinforce the slits with a small dab of fabric glue. You can also use a product like Fray Check. This will help prevent the slits from wearing over time.


Step 4: From the right side of your fabric, slide the prongs of the male side of the magnetic snap into the slits. The prongs should poke out on the wrong side of your fabric, as shown above.


Step 5: Place the magnetic snap plates over the snaps on the wrong side.


Step 6: Bend the prongs outwards.


Final view from the right side of flap (C) piece.


Final view from the wrong side of flap (C) piece. This side will be covered up as you assemble the flap.

Now you just need to install the female side on the bag in the same way. Snaps complete!

The Cooper Sewalong

  1. The Speedy Cooper Sewalong & Contest (20 Comments)
  2. Bag making supplies and resources (46 Comments)
  3. How To Install Magnetic Snaps (5 Comments)
  4. Cooper versions 1 & 2: Assembling the body
  5. Cooper version 3: Assembling the front
  6. How To Create Adjustable Straps
  7. Cooper Version 2: Backpack Straps (5 Comments)
  8. How To Install Jiffy Rivets (2 Comments)
  9. Cooper Version 3: Attaching Satchel Handles
  10. Video: How to square the bottom of your bag (4 Comments)
  11. Finishing the body and flap
  12. Cooper Version 1: Messenger Strap
  13. Lining your Cooper bag (5 Comments)
  14. The Cooper Sewing Contest: Vote For Your Favorites! (30 Comments)
  15. Cooper Sewing Contest: The Winners! (3 Comments)

The Cooper Companion

Interested in making the Cooper bag? Get this in-depth guide to bag making, and we'll walk you from start to finish. With over 400 photos, this guide takes you through all three variations (messenger, backpack, and satchel), along with perfectly illustrated instructions for added details, techniques, and variations.

Order yours here


How funny, I just bought a few magnets on ebay! This is very useful! Thank you!

I just added magnetic snaps on a purse that I made! I also added fusible fleece on the back side so the edges aren’t poke-y and to add an extra layer of protection.

gabriel ratchet

was just going to say that i’m adding a piece of fusible interfacing to the snap zone for reinforcement. fusible fleece is an even better idea….although i haven’t any to hand in my stash at the moment…


Maybe this fabric is stiff/thick enough one its own, but I also add a small square of interfacing for the prongs to poke through. Even when using cotton duck. Just one less thing to worry about, lol.

Awesome! I always wondered how those things are installed!! Thanks for the post!