Closet Core Patterns Jasika Blazer

Closet Core Patterns


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Buy the Jasika Blazer sewing pattern from Closet Core Patterns. The Jasika Blazer is a classic tailored jacket with a semi-fitted shape that will never go out of style. With just the right amount of polish and detail, Jasika is a wardrobe workhorse and a mighty skill builder. The instructions use modern speed tailoring methods, fusible interfacings and minimal hand sewing to make tailoring fun and accessible for everyone. Make a blazer you’ll want to wear forever!

This jacket is fully lined and features a classic notched collar, single button closure, back vent, shoulder pads, welt pockets and gorgeous two-piece sleeves. Optional details include pocket flaps, topstitching, decorative sleeve cuff buttons and leather or suede elbow patches.

This sewing pattern is available to buy in the following format:

– PAPER (next working day dispatch on orders and FREE UK delivery over £50)

Suggested fabrics:

Jacket body: Medium to heavyweight suitings or lightweight coatings with surface texture such as wool melton, wool flannel, crepe and tweed. Velvet, medium-heavy weight cotton, seersucker and linen may also be used. Note: Tightly woven, smooth surfaced suitings like wool gabardine are not recommended since they can be difficult to fuse using an iron.

Lining: Rayon bemberg, charmeuse, crepe de chine, silky cottons like voile.

Pockets: Sturdy cotton like shirting, quilting cotton or muslin (0.25 yd/m).

Fabric requirements:

45″ (1.14 m) wide fabric: Jacket body: Sizes 0-8 = 2.5 yd (2.3 m) / Sizes 10-14 = 2.75 yd (2.5 m) / Sizes 16-20 = 3 yd (2.75 m) // Lining: Sizes 0-8 = 1.5 yd (1.4 m) / Sizes 10-20 = 2.25 yd (2 m).

58″ (1.5 m) wide fabric: Jacket body: Sizes 0-8 = 1.75 yd (1.6 m) / Sizes 10-14 = 2 yd (1.85 m) / Sizes 16-20 = 2.25 yd (2 m) // Lining: Sizes 0-14 = 1.5 yd (1.4 m) / Sizes 16-20 = 1.75 yd (1.6 m).

Sizing: 0 – 20 (approx. UK 6 – 20, based on our standardised size chart). Please also check the designer’s size chart and finished garment measurements.

This size range is based on a B cup bust and an average height of 5’6″. Please note that B cup does not refer to bra sizing, but rather to the difference in inches between high and full bust. A 2″ difference between those measurements is equivalent to a B cup.

Notions: Fusible weft interfacing (1.5 yd/1.4 m); fusible knit interfacing (1 yd/0.8 m); horsehair canvas (0.25 yd/m); 1/4″ wide cotton stay tape (2.5 yd/2.4 m); shoulder pads (1/4″-3/8″ thick); sleeveheads or lambswool/cotton batting cut into 2″ wide bias strips; one lapel button (3/4″/19 mm); one clear button; handsewing needles and thimble; tailors ham and seam roll; press cloth (cotton or silk organza); point presser or wood clapper; polyester thread // Optional: leather or suede for elbow patches; six sleeve buttons (5/8″/16 mm); topstitching thread for collar; silk basting thread.

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Additional information


Heavyweight Cotton, Linen, Velvet, Wools

Make time

All weekend or longer

Sewing level



UK 6 / US 2 / EU 34, UK 8 / US 4 / EU 36, UK 10 / US 6 / EU 38, UK 12 / US 8 / EU 40, UK 14 / US 10 / EU 42, UK 16 / US 12 / EU 44, UK 18 / US 14 / EU 46, UK 20 / US 16 / EU 48

Pattern format


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