Beginner

Retro Short Trunks

Short-cut retro swim trunks with a slim fit, 3-inch inseam, built-in brief liner, and a side split hem. Drafted to your waist, hip, and rise.

Enter your measurements and customize. Preview before you buy.

Drafted from 5 of your measurements. No size chart approximation.

What You Get

Pattern pieces: Front Panel, Back Panel, Front Liner Panel, Back Liner Panel, Waistband, Side-Seam Pocket Bag
Download formats: Tiled PDF (US Letter and A4 for home printing), projector file for no-print cutting, A0 large-format for copy-shop printing
Construction steps: 1. Assemble liner / 2. Prepare pocket bags / 3. Sew center front seam...
Materials guide: Fabric recommendations with yardage estimates, notions list, needle and thread guide, and machine settings
Scale check: 1:1 verification square so you can confirm print accuracy before cutting any fabric

Fit: Slim (+2.5″) , stretch fabric only / Regular (+4″) / Relaxed (+6″)
Side pockets: None / Side-seam mesh bag ×2
Liner: Full mesh panels (board-short style) / Brief-cut liner (retro style) / No liner
Hem side split: None / 1″ slit (retro/athletic)
Back pocket: None / Small patch pocket
Rise style: Ultra low (2000s, −2.5″) / Low rise (−1.5″) / Mid rise (body rise) / High rise (+1.5″) / Ultra high (paperbag, +3″)
Seam allowance: ⅜″ / ½″
Hem finish: ½″ turned & stitched / ¾″ with binding tape

Every dimension is drafted from your measurements. No grading, no size charts.

What we draft	Source
Waist circumference	Drafted directly from your waist measurement
Hip circumference	Drafted directly from your hip measurement
Crotch rise	Drafted directly from your rise measurement
Thigh circumference	Drafted directly from your thigh measurement
Inseam length	Drafted directly from your inseam measurement

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How short is the inseam?

The inseam defaults to 3 inches for the retro mid-thigh silhouette. You can adjust it if you want a bit more coverage.

What does the built-in liner do?

A lightweight mesh brief liner is sewn into the waistband so you don’t need separate underwear for swimming.