Learn to Sew a Classic Blazer

Mastering Modern Speed Tailoring

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Are you curious about tailoring but don't know where to begin? Do you want to grow and expand your skillset and push your sewing practice to the next level?

Welcome to the class designed to demystify the fine art of speed tailoring! Spoiler alert: it's not as hard as you think, and the skills and techniques you'll learn will truly level up your entire sewing practice. That high-end blazer you've always wanted is just a few hours away, only this time it's constructed and fit for your exact body, using professional, industry-level techniques and secrets.

Learn to Sew a Classic Blazer is a thirteen lesson, 5+ hour long comprehensive online course that guides you through the process of sourcing, stitching and finishing your own custom made blazer using modern speed tailoring techniques. No need for pad stitching or fiddly sew-in interfacings - you'll learn how to use fusible interfacings to quickly add structure and shape to a blazer that will fit like it was made for you (because it was!)

By following along using the included Jasika Blazer pattern (although the skills and techniques can be applied to any blazer pattern), Heather Lou of Closet Case Patterns teaches each lesson in simple language everyone can understand, so both advanced and novice sewists alike will feel confident creating beautiful, custom-made blazers from the comfort of their own home.


Work at your own pace – anytime, anywhere, on any device – and learn the ins and outs of creating structure with readily available and easy to apply fusible interfacings, along with industry level speed tailoring techniques & skills you'll use forever.



✂ Where to shop for and source beautiful tailoring fabrics, interfacings and all necessary supplies.
✂ How to find the perfect size for your body, grade in-between sizes and make a test muslin.
✂ Basic jacket fitting, with an in-depth downloadable ebook to help you identify and solve any potential fit issues.
✂ Best methods for prepping, marking and cutting fabric and interfacings.
✂ How to create structure and dimension in a tailored jacket using fusible interfacings you can apply at home with a regular iron.
✂ Two different styles of welt pockets.

✂ How to confidently sew a gorgeous notched collar that rolls beautifully at the lapel.
✂ Classic hand-stitching techniques for a truly flawless finish.
✂ How to sew and set-in a beautifully fitting two piece sleeve.
✂ How to insert sleeveheads and shoulder pads for professional-looking results (including free patterns for both!)
✂ Tips for adding painless and professional-looking details like buttonholes, buttons and topstitching.
✂ Industry techniques like how to quickly bag a coat lining with a minimum of handstitching.



While you can use any pattern on the market to follow along (including patterns for men, since the skills are the same), we have created an exclusive jacket pattern for you to use in this workshop. Our Jasika Blazer was painstakingly developed and tested for almost two years, with lots of input from real world tailors. Featuring all the landmark details of a classic blazer, it has a timeless, semi-fitted silhouette with lots of opportunity for customization, and can easily go from casual to formal depending on fabric choice.

Available as a digital file, you will be able to download a free copy of this pattern upon enrollment, which includes B, C & D cup sizes. Prefer a paper pattern? Visit the Getting Started section of the course for a 50% discount to use on a printed version of the file.


  • A comprehensive Blazer Fitting Ebook to help you diagnose dozens of common fitting issues, along with instructions on how to assess fit, how to make a muslin and a Blazer Fitting Checklist to print and use while fitting your jacket.
  • Printable cutting list to help you keep track of pattern pieces.
  • Detailed supply guide to help you source fabric and supplies.
  • Free patterns for sleeveheads and shoulder pads.



✂ Learn anytime, on any device, with unlimited access.
✂ Self-paced lessons mean you decide when the course begins and ends, and how many times you watch it over again.
✂ Helpful tips, techniques, and methods for making your own blazer from an industry professional
✂ Acquire sewing skills that are transferrable and can be built upon in future sewing projects.
✂ Get additional help! You can always count on a response from Heather when you leave a comment or question in the lesson.

Your Instructor

Heather Lou
Heather Lou

Heather Lou is a pattern designer, blogger, and sewing educator for the modern maker. As the force behind Closet Core Patterns, she has been writing about sewing for over ten years, and has taught thousands of people to sew, both online and in her sold-out sewing workshops across North America & Europe. Her work has been featured in Threads, Sew News, Seamwork, Love Sewing and Sewing World magazine.

With her contagiously positive attitude, Heather’s teaching style is fun and filled with helpful tips and techniques to help you transform the outfits in your imagination into a self-made wardrobe you love -- not one you’re limited to buying off the rack.

Keep in touch with Heather over on the popular Closet Core Patterns blog.


This has been the richest sewing learning experience I've ever had. I feel like I've had personal by my side tuition. I can hardly believe I am sitting here in my sewing room in Auckland, New Zealand, looking at a Blazer which looks pretty damn close to the course samples and rivals anything I am seeing in RTW. The tailoring skills I've acquired will generalise to any coat or suit project I put my mind to now. I just love my new Blazer and feel really proud of what I have have accomplished. A big bouquet to Heather and her team!

- Robyn Jury

I learned so much! This wasn't my first run with tailoring or outwear but it was so helpful. The Jasika Blazer is a beautifully drafted pattern with exceptional instructions but the online class elevated the experience. I learned not just how but why. Loved it. Now, how many jackets does a person need??

- Ainslie Gilchrest

This workshop has significantly upgraded my garment sewing skill set. Up to this point, I have confidently sewn many professional looking garments, but this is the next step into an actual professionally sewn garment. I look at this jacket and even with my first time flaws, it is well beyond anything in my closet. Home or professionally sewn.

- Antoinette McNulty

I was so inspired by the feedback on my muslin.Heather's guidance helped me make the right alterations and her encouragement gave me even more motivation. Although I am a perfectionist,I appreciated her belief that each sewist decides when their work is complete.I feel I worked toward and exceeded my Personal Best!

- Nancy Conners


Q: I’m psyched about making my own blazer! How do I sign up to get started?

A: Welcome to the course that changes everything about how you make a classic blazer! To get sewing, click on the button at the top or bottom of this page, and you’ll be enrolled immediately.

Q: When does the course start and finish?

A: The beauty of Closet Case Patterns’ online courses is that you call the shots on when they begin and end. Learn to Sew a Classic Blazer is a completely self-paced, online course, which means you get to decide when you start, when you finish, and how many times you replay it.

Q: What will I need to get started?

A: Before you get started, we’ll share a complete supply list, along with information about where and how to source everything on said list. At the very least, you’ll need a sewing machine, iron, tailor's ham, tailor's clapper or point presser, pinking shears and regular shears, marking tool, tailoring fabric and interfacing.

Q: How long does the course take to complete?

A: It’s up to you! To give you an idea of how long the course is start to finish, the video runs just over 4 hours long and comprises 13 lessons total. Binge watch them in a weekend, or do a little at a time. You can return to the course as many times as you’d like, and there’s no time limit for you to complete in.

Q: How do I get my free pattern?

A: Once you enroll in the course, you’ll be able to download a PDF copy of the Jasika Blazer. Head to the “Getting Started” session to download it to your device of choice.

Q: Can I use any other blazer pattern? What about using a men's pattern?

A: This course focuses on construction and technique, and while we use the Jasika Blazer to demonstrate on camera, you can follow along using absolutely any blazer pattern you prefer, including a men's pattern.

Q: What if I want a printed pattern?

A: If you’d like a print copy of our Jasika Blazer, we offer a 50% discount to all class participants. Visit the “Getting Started” section and follow the instructions to get your copy.

Q: How long can I access the course?

A: All day, ‘erryday. But for real, this course includes lifetime access. After you enroll, the course is yours, which means you’ve got unlimited access for as long as you like, across all devices for all of eternity.

Get started now!