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A fresh twist on tailoring, this oversized, double-breasted blazer is reimagined for summer. Unlined for a simplified finish, it features short sleeves, structured shoulders, classic welt pockets, and a faux breast pocket. Designed to pair with matching shorts, it’s the perfect blend of polish and nonchalance. A seasonal project for the confident, style-savvy sewist.
1 cm (3/8″) seam allowance included!
Material
- FABRIC: 2 m (2 1/4 yd) medium-weight crêpe suiting, gabardine, or linen
- LINING: 0.3 m (3/8 yd) Bemberg lining
- INTERFACING: 0.9 m (1 yd ) fusible interfacing
- Universal needle
- All-purpose thread
- 2x shoulder pads
- 2x buttons, 2 cm (3/4”) wide
- Buttonhole cutter or seam ripper
- Hand sewing needle
Important: Fabric requirements are based on a fabric width of 150 cm (59″). If your fabric is narrower, additional yardage may be required.
Download the free PDF sewing pattern…
… and once you’re done, share a photo of you wearing proudly your new blazer with #unfetteredpatterns or tag us @unfetteredpatterns!
Need help to print your pattern? Check our detailed tutorial here! Also, find out how you can customize your pattern for A0 printers and projectors here.
Need help completing the project?
Visit our Ko-fi store for printable sewing tutorials, complete with step-by-step instructions, detailed line drawings, a comprehensive sizing guide, and a full list of required materials!
Sizing Guide
This pattern is drafted according to the following body measurements. Standard height is 1.64 m (5.4 ft). Check this tutorial if you want to add sizes to your pattern!
If you want to adapt the length of your garment to your height, check this helpful tutorial here!
| XS | S | S/M | M | M/L | L | XL | |
| Bust | 85 cm (33 1/2″) | 89 cm (35″) | 93 cm (36 1/2″) | 97 cm (38″) | 101 cm (39 1/2″) | 105 cm (41″) | 109 cm (42 1/2″) |
| Waist | 64 cm (25 1/2″) | 68 cm (27″) | 72 cm (28 1/2″) | 76 cm (30″) | 80 cm (31 1/2″) | 84 cm (33″) | 88 cm (34 1/2″) |
| Hips | 94 cm (36 1/2″) | 96 cm (38″) | 100 cm (39 1/2″) | 104 cm (41″) | 108 cm (42 1/2″) | 112 cm (44″) | 116 cm (45 1/2″) |
Finished garment measurements
Also, keep in mind that the final measurements have a significant amount of ease built in to create a more relaxed silhouette.
| XS | S | S/M | M | M/L | L | XL | |
| Bust | 101 cm (40″) | 105 cm (41 1/2″) | 109 cm (43″) | 113 cm (44 1/2″) | 117 cm (46″) | 121 cm (47 1/2″) | 125 cm (49″) |
| Biceps | 38.9 cm (15 1/4″) | 40.1 cm (15 3/4) | 41.3 cm (16 1/4″) | 42.5 cm (16 3/4″) | 43.7 cm (17 1/4″) | 44.9 cm (17 3/4″) | 46.1 cm (18 1/4″) |
| Length | 77.5 cm (30 5/8″) | 78.5 cm (31″) | 79.5 cm (31 3/8″) | 80.5 cm (31 3/4″) | 81.5 cm (32 1/8″) | 82.5 cm (32 1/2″) | 83.5 cm (32 7/8″) |
Sewing Notes
Here are some tips we recommend for a successful sewing project:
Fit and style
- Choose a size based on your bust. Take a look at the body measurements chart to guide you.
- To get your bust size, measure around the fullest part of your chest. Take a nice deep breath before you check the number—just to make sure the measuring tape isn’t too tight. You want it snug, but not squeezing you.
- On the finished garment measurements chart, see how long the garment is and if it’ll work for your height. It’s a good idea to compare the length with something similar you already own.
- Just keep in mind that this jacket should extend past the hips to cover the buttocks.
- If you want to adapt the length of your garment to your height, check this helpful tutorial here!
Fabrics
- When you’re picking out a fabric, go for something that has a little stiffness to it to get that structured look. Steer clear of flowy materials! Also, going for a medium-weight fabric is a smart move to keep things from getting too bulky.
- For this project, I recommend using Bemberg or viscose lining since it’s light and breathable, making it just right for summer clothes. Also, make sure to pick one that’s machine washable; it’ll be much easier to care for the final piece.
- Choose a lightweight interfacing so it doesn’t add bulk to the fabric. Also, grab a color that’ll blend right in with light-colored fabric!
Cutting out
- Before you start cutting your fabrics, wash and dry them like you’d do for the finished piece. Keep in mind the fabric type and what it’s made of so you choose the right cleaning method (like how hot the water should be or what kind of cycle to use…). Plus, the dyes used on certain fabrics tend to bleed when washed, so wash yours separately, or with similar colors.
- After you wash and dry the fabric, give it a good press to get rid of any creases. Just make sure your iron is set to the right temperature for the fabric. Generally, synthetic fibers like acrylic, spandex, or polyester should be pressed on low heat, while natural fibers like cotton, wool, or linen can handle higher heat.
- When you’re set to cut the fabric, just fold it lengthwise right sides together. Make sure the fold is straight and doesn’t twist up. If it does, unfold it and refold until it’s nice and flat. Then, lay out the pattern pieces so the grainline runs parallel to the selvages.
- Make sure you don’t cut the notches too long; aim for them to be around 0.3-0.4 cm long (1/8″). Also, be sure to also trace all the pattern markings on the fabrics with a tailor’s chalk or a fabric marker.
Sewing
- Before you start sewing, grab a scrap piece of fabric and try out a few stitches to see how the tension and stitch length look. If the seam isn’t turning out great, try re-threading your machine first. Still not working? Then go ahead and adjust the tension. As for stitch length—thicker fabric usually needs longer stitches, so adjust that as needed. And if your stitches are skipping, switch to a new needle or to a bigger one.
- This project is labelled intermediate level, making it an excellent choice for those looking to develop their sewing skills further.
- If you’re unsure how to sew buttonholes, just take a look at your sewing machine manual. The process can differ from one machine to another.
Good luck with your sewing project!
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Thank you for posting this! I appreciate the resources :DDD
It’s proving to be quite a challenge, since I am a mere confident beginner and the instructions are fairly summarized. If it’s any help to anybody, I recommend watching this video I found as a guide, as a lot of the assembling can be applied to this project https://www.youtube.com/watch?v=ZghLltCIJmo
Also, it is indeed oversized, so stick to your size- or maybe even go down a size unless you’re looking for really loose fit.
Thanks again!
Olá! É possível colocar uma manga comprida no blazer? Do Brasil.