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Pocket flap pattern

Create a pocket flap pattern from your measurements

Generate a free printable pocket flap with rounded, straight, or pointed shapes, seam allowances, stitch line, and optional button or buttonhole marks. Match it to a patch pocket or draft it as a standalone detail.

Open flap builder All templates
Flap preview

Generated example

A flap sized from the pocket opening

Pocket compatibility

This rounded example covers a 14 cm pocket with 0.8 cm extension per side, producing a 15.6 cm finished flap plus separate sewing allowances.

Coverage

The flap is wider than the pocket

Side extensions are calculated around the pocket opening instead of guessed after the flap is drawn.

Closure

Shape and fastening stay independent

Rounded, straight, or pointed edges can be combined with no closure, a button, or a buttonhole extension.

Opening the flap tool from a generated patch pocket transfers its width, keeping the two related details traceable.

Generate a pocket flap
Generated rounded pocket flap

Download the flap as tiled A4 PDF, full-size PDF, or editable SVG.

Related guides

New Template

Patch Pocket

Generate a clean patch pocket pattern with rounded, square, or angled bottom shapes.

 Generator

Basic dress pattern

Build a connected bodice and skirt draft with waist, darts, length, and hem checks.

 Construction

Seam and hem allowances

Read solid seam lines, dashed cutting lines, construction seam allowance, hem allowance, curves, and corners.

Pocket flap pattern guide

Printable pocket flaps matched to pocket width and closure style

The generator converts pocket width, finished flap width, depth, side extension, seam allowances, shape, and closure marks into a full-size pocket flap pattern. Use these notes to keep the flap proportional to the pocket and practical to sew.

Included

Flap outline with seam, stitch and closure guides

The export includes the cut outline, finished flap outline, top seam line, side and bottom seam allowances, optional button or buttonhole mark, labels, and a 5 × 5 cm test square.

Measurements

Pocket width, flap depth, side extension and seam allowances

Pocket width sets the reference size. Flap depth controls coverage, side extension creates overhang beyond the pocket, and seam allowances define how the flap will be sewn and turned.

Shapes

Rounded, straight or pointed lower edge

Rounded flaps soften the design, straight flaps work for clean utility details, and pointed flaps create a sharper closure line. The shape should suit both the pocket and the garment style.

Compatibility

Match the flap to the finished pocket width

When the flap sits over a patch pocket, check it against the finished pocket width after seam allowances are turned. A flap can be the same width, slightly wider, or intentionally narrower depending on the design.

Closure

Plan button or buttonhole marks before stitching

Use the closure mark as a placement guide, not a final hardware decision. Test button size, buttonhole length, fabric thickness, and flap depth on a sample before cutting final fabric.

Printing

A4 tiled PDF, copyshop PDF or SVG

Print at actual size or 100% with scaling disabled and measure the test square first. Use tiled A4 at home, copyshop PDF for a full-size sheet, or SVG for vector editing.

Flap proportion and attachment

Match a pocket flap to the pocket and garment

A flap can cover a patch pocket, finish a welt opening or act as a decorative detail. Its finished width must relate to the opening beneath it, while depth, side extension, corner shape, closure marks and turn-of-cloth determine the visible result. Draft the receiving pocket first whenever the two pieces must match.

Width

Cover the finished opening, not the cut piece

Measure the pocket or welt after seam allowances are removed. Side extension provides coverage beyond that opening and can hide small alignment differences, but too much extension looks heavy and may catch on nearby seams. Center the flap from stable garment references rather than from a raw edge.

Depth

Check access and closure position

A deep flap protects the opening but must lift far enough for a hand and should not hide most of a small pocket. Button or snap position needs space below the attachment seam and above the shaped tip. Fold a paper flap over the actual pocket to judge proportion.

Shape

Rounded, straight and pointed edges turn differently

Rounded edges need clipped and graded allowances plus careful pressing. Sharp points require room for seam allowance trimming and a controlled turn; an extremely narrow point will blunt in thick fabric. Straight shapes are easiest to align but still need symmetrical corners.

Layers

Outer and underflap do not travel equally

The outer layer travels over the edge and can pull the seam outward if both layers are treated identically in bulky fabric. Test interfacing and turn-of-cloth, grade the allowances, and roll the seam slightly toward the underside instead of altering the attachment width.

Flap-to-pocket check

Sew one complete flap and place it on the prepared pocket or opening before attaching it.

  1. 01 Measure the finished receiving opening and verify flap width plus side extension against that value.
  2. 02 Place the actual button, snap or buttonhole template on the marker and check clearance from seams and shaped edges.
  3. 03 Fuse, sew, trim, turn and press a sample to see the true finished corner shape and thickness.
  4. 04 Pin the flap along its finished attachment line, fold it down and inspect level, coverage and access on the body.
  5. 05 For paired flaps, mirror placement marks from common garment references and compare both finished pieces before attachment.

How and when

Generated from application code

This generator converts the entered measurements into vector geometry. Where a construction has related seams, the software can calculate their lengths; preview, SVG, copyshop PDF, and tiled A4 PDF are produced from the same geometry. These software checks do not replace printing, sewing, or fitting a test sample.

Last recorded review of the generator implementation and documentation: 2026-07-13. The output has not been certified through physical production testing; verify measurements, print scale, seam relationships, fabric behaviour, and fit for your project.

Read the methodology About the project

Common questions

Pocket flap pattern FAQ

Is the pocket flap pattern generator free?

Yes. Enter the flap measurements, preview the generated shape, and download SVG, copyshop PDF, or tiled A4 PDF without purchasing a fixed-size pattern.

Should the flap be wider than the pocket?

Often the flap is the same width as the finished pocket or slightly wider because of side extension. Check the finished pocket width after turn-under allowances, then choose the visual overhang you want.

Which pocket flap shape should I choose?

Use rounded flaps for softer garments, straight flaps for minimal or utility styles, and pointed flaps when you want a more directional closure detail.

Can I generate a flap from a patch pocket?

Yes. The patch pocket workflow can pass the pocket width into this flap generator, then you can adjust depth, side extension, shape, seam allowances, and closure marks before export.

How should I print the A4 pocket flap pattern?

Select actual size or 100%, disable fit-to-page scaling, and measure the 5 × 5 cm test square before cutting the printed flap.

Workflow

01

Choose shape

Start from rounded, straight, or pointed flap presets.

02

Match the pocket

Use the pocket width or set the final flap width directly.

03

Export files

Download SVG, copyshop PDF, or tiled A4 PDF for 100% printing.