Men’s Comox Trunks

Thread Theory



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.

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).

This sewing pattern is available in PAPER and PDF formats. The PDF pattern will be available immediately for download after purchase.

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


PDF Printing

8 pages

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