Verified Open Pattern (1.0.0-published)

This pattern includes verified home printable specification files, dual-unit sizing charts, and full cutting guides. Upstream source: Threadline Open Design Studio (CC BY-SA 4.0).

Breton Mariniere Confident Beginner XS – 3XL

Classic French Breton Mariniere

Classic French Breton Mariniere. Sourced directly from verified open distributions with authentic rights. Includes complete size tables, ease notes, and illustrated construction steps.

Jump to Downloads Front & Back Views Size & Measurements Fabric & Tools Step-by-Step Instructions

Technical Garment Schematics

Front and back flats illustrating seam lines, hem curves, and design details.

Front Elevation

Back Elevation

Sizing & Measurement Tables

Review both body benchmarks and finished garment ease before cutting your cloth.

Measurement Unit

Toggle between metric and imperial values across all charts

1. Body Measurements Chart

Your physical body dimensions. Measure over undergarments with a snug tape.

Swipe sizes

Size	Bust	Waist	Hip
XS	80 cm	62 cm	88 cm
S	86 cm	68 cm	94 cm
M	92 cm	74 cm	100 cm
L	98 cm	80 cm	106 cm
XL	108 cm	90 cm	116 cm
2XL	118 cm	100 cm	126 cm
3XL	128 cm	110 cm	136 cm

2. Finished Garment Measurements Chart

Dimensions of the sewn garment, including designed wearing ease.

Swipe sizes

Size	Finished Bust	Finished Length	Bottom Hem	Bicep Circumference
XS	88 cm	60 cm	92 cm	27 cm
S	94 cm	62 cm	98 cm	28.5 cm
M	100 cm	64 cm	104 cm	30 cm
L	106 cm	66 cm	110 cm	32 cm
XL	116 cm	68 cm	120 cm	35 cm
2XL	126 cm	70 cm	130 cm	38 cm
3XL	136 cm	72 cm	140 cm	41 cm

Size Selection Guidance

Select size based on full bust/chest measurement.

Wearing Ease Explanation

+4 to +8 cm positive wearing ease for comfortable drape.

Fabric & Materials

Recommended substrates, stretch allowances, yardage requirements, and required notions.

Recommended Fabrics

Lightweight to medium-weight suitable fabric substrates

Lightweight to medium-weight suitable fabric substrates
Pre-washed natural fibers (cotton, linen, or bamboo)

Stretch Requirement: None (0% stable woven)

Notions & Sewing Tools

Ensure you have these ready before starting.

Notions:

Matching all-purpose polyester or cotton sewing thread
Universal sewing needle (size 80/12)

Tools Required:

Sewing machine
Fabric shears
Pins or fabric clips
Steam iron and ironing board

Fabric Yardage Requirements

Size Bracket	115 cm (45") Width	150 cm (60") Width
XS – M	1.6 m (1.75 yd)	1.3 m (1.4 yd)
L – XL	1.9 m (2.1 yd)	1.5 m (1.65 yd)
2XL – 3XL	2.2 m (2.4 yd)	1.8 m (1.95 yd)

Seam Allowances & Cutting Layout

Exact seam allowances included in pattern lines, piece list, and cutting discipline.

Standard Seams

10 mm (3/8 in) included on all seams.

Hem Allowance

15 mm (5/8 in) double-fold hem.

Neck & Armhole

6 mm (1/4 in) for neckband or binding attachment.

Pattern Pieces to Cut

Piece Name	Quantity & Orientation	Grainline / Cutting Notes
Front Bodice on Fold	Cut 1 on Fold	Align horizontal stripe repeats horizontally
Back Bodice on Fold	Cut 1 on Fold	Align horizontal stripe repeats horizontally
3/4 Sleeve	Cut 1 Pair	Align stripe pattern across armscye notches
Neckline Facing Strips	Cut 2 Strips	Cut on straight grain for boatneck stabilization

Fabric Cutting Checklist:

Press fabric before cutting to remove packing folds and pre-shrink fibers.
Align piece grainlines strictly parallel to fabric selvages.
Transfer notch markings with small 3 mm snips into the seam allowance margin.

Printable Pattern Files

Download PDF files for home printing on standard desktop printers.

Download Pattern Files

1.0.0

Direct pattern downloads. No registration, email capture, or paywalls required.

Updated: 2026-03-09

Instructions Available

Complete offline sewing guidebook with dual calibration test squares, yardage charts, pattern piece cut list, numbered steps, and troubleshooting.

14.1 KB • 4 pages

Download (14.1 KB)

A4 Available

Full-scale 1:1 tiled master pattern for A4 paper (17 sheets). Includes dual 50mm/2.0in calibration boxes, assembly map, grainlines, and corner registration crosshairs.

107.3 KB • 17 pages

Download (107.3 KB)

US Letter Available

Full-scale 1:1 tiled master pattern for US Letter paper (19 sheets). Includes dual 50mm/2.0in calibration boxes, assembly map, grainlines, and corner registration crosshairs.

120.8 KB • 19 pages

Download (120.8 KB)

Printer Calibration Test Sheet (Free Single Sheet) 2.4 KB

Print at 100% scale (no fit-to-page) and measure the 50mm and 2-inch test boxes with a hard ruler.

Download Test Sheet

Print Instructions:

Open the downloaded PDF in Adobe Acrobat Reader or a dedicated desktop PDF viewer. In the print dialog, select "Actual Size" or "Custom Scale: 100%". Never select "Fit to Printable Area". Always measure the calibration square on Page 1 before proceeding.

These files are prepared from documented pattern references through a technical drafting workflow. If anything appears incorrect, unclear, or causes a sewing problem, email feedbacksewingpattern@gmail.com. Send pattern feedback.

100% Scale Verification

Print Page 1 at 100% scale without page scaling. Check Metric box (50 mm x 50 mm) or Imperial box (2.0 in x 2.0 in = 50.8 mm) with a rigid ruler.

Read full printing & calibration guide →

Tile Assembly Instructions

Align numbered registration marks and butt tile edges flush without overlapping untrimmed paper. Tape securely.

Step-by-Step Sewing Instructions

Draft construction notes. Readable online; review against the pattern pieces before sewing.

Finish Boatneck Edge

Apply Neckline Facing Strips to Front Bodice on Fold and Back Bodice on Fold right sides together. Turn under and topstitch with twin needle. Press seam allowances flat.

Shoulder Seams

Align Front Bodice on Fold and Back Bodice on Fold right sides together. Stitch short shoulder seams with clear elastic reinforcement. Press seam allowances open.

Insert 3/4 Sleeves Flat

Insert 3/4 sleeves flat into armholes right sides together, matching stripes at notches. Stitch with stretch stitch and press seam allowances.

Side Seams with Vents & Hem

Align front and back bodices right sides together. Stitch side seams stopping 6 cm above hem for side vents. Press seam allowances. Twin needle hem sleeves, side vents, and bottom edge.