Men’s Comox Trunks

Thread Theory


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Buy the Men’s Comox Trunks sewing pattern from Thread Theory. These form-fitting trunks are designed with comfort in mind. No centre back seam, a reinforced inseam gusset and a shaped front cup make these boxers fit like a second skin without the worry of rubbing or shifting. Short athletic legs and a smooth elastic waistband create a streamlined silhouette that can be worn under everything from slim fit pants to gym shorts.

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

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

– PDF (available to download immediately after purchase). What is a PDF?

– PDF pattern + Printed A0 copy shop (We print out the A0 pattern sheets, but you’ll need to download the digital instructions, as we don’t print these. The PDF files will be emailed immediately after purchase, and the A0 pattern sheets will be dispatched next working day). What is Copy Shop?

Suggested fabrics: Cotton, bamboo, or blended lightweight knit with (preferably) at least 4% spandex/elastane and four-way stretch. The knit you choose should have 60-70% stretch. For sporty, versatile trunks, choose a lighter weight knit. For thicker, cosier trunks, choose a heavier T-shirt weight knit. Avoid tissue weight knits as these will not be strong enough.

Fabric requirements: 115 cm/45″ wide fabric: sizes 24-36, 0.8 m/0.9 yards; sizes 39-45, 1.0 m/1.1 yards // 150 cm/60″ wide fabric: sizes 24-36, 0.6 m/0.7 yards; sizes 39-45, 0.9 m/1.0 yards.

Sizing: Waist 24″ – 45″. Please check the size chart and finished garment measurements.

Notions: Elastic waistband (1-1/2″ to 1-3/4″ wide).

PDF pattern includes: A detailed instruction booklet containing step-by-step instructions and diagrams; a print-at-home pattern on 8 pages (suitable for both US letter and A4 size paper); a copy shop pattern suitable for 36″ wide roll feed printers; a copy shop pattern suitable for A0 paper.

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Additional information


Jersey / Knits / Scuba

Sewing level

Confident Beginner

Make time

Half a day

Pattern format

PAPER, PDF, PDF pattern + Printed copy shop (+£7.00)

PDF Printing

8 pages

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