Neckline length is the primary target
The collar is driven by the garment neckline measurement, not by a clothing size label.
Collar pattern
Create a collar pattern from your neckline measurements
Generate a free printable shirt collar, stand collar, or flat collar with seam allowances, center-back guide, roll line, overlap guide, and button marker. Match the collar to the finished neckline before exporting SVG, copyshop PDF, or A4 PDF.
Collar pattern preview
Generated example
A shirt collar calculated from a 42 cm neckline
Neckline-matchedThis live example uses a 42 cm neckline, 3 cm stand, 5 cm fall, 2 cm overlap, and 0.7 cm roll allowance to generate the collar and stand.
Stand, fall, and overlap are separate
Each structural part is adjustable so a stand collar, flat collar, and shirt collar produce genuinely different geometry.
For best compatibility, transfer the finished neckline from the bodice, dress, or shirt generator and test the collar on the actual neckline seam.
The collar set is downloadable as A4 PDF, full-size PDF, and editable SVG.
Related guides
Project
A classic shirt, end to end
Eight generators, three of which hand values to each other automatically. The drafting order, the sleeve join nothing checks for you, fabric and the sewing sequence.
GeneratorBasic bodice pattern
Draft a bodice block with neckline, armhole, shoulder, length, and waist shaping.
GeneratorBasic dress pattern
Build a connected bodice and skirt draft with waist, darts, length, and hem checks.
ConstructionSeam and hem allowances
Read solid seam lines, dashed cutting lines, construction seam allowance, hem allowance, curves, and corners.
Collar pattern guide
Printable collars matched to the finished neckline
The generator converts the finished neckline length, collar style, stand height, fall height, overlap, roll allowance, and seam allowance into full-size collar pieces. Use these notes to choose the right collar type and verify it against the bodice, dress, or shirt neckline before cutting.
Collar pieces with seam and construction guides
The export includes cutting outlines, seam lines, center-back marks, overlap guide, button marker where applicable, roll line for shirt collars, labels, and a 5 × 5 cm test square.
Neckline length, stand height, fall height and overlap
Use the finished garment neckline measured along the stitching line after shoulder seams and seam allowances are accounted for. Stand height controls the neck band; fall height controls the visible collar leaf.
Shirt collar, stand collar or flat collar
A shirt collar uses a separate stand and collar leaf, a stand collar is a clean band around the neck, and a flat collar sits closer to the garment neckline with minimal stand.
Match the collar to the prepared neckline
Do not use raw body neck circumference as the final collar length. Measure the actual bodice, dress, or shirt neckline along the seam line and test the collar before cutting final fabric.
Check roll, interfacing and button overlap
Collars are sensitive to fabric thickness and interfacing. Test the roll line, stand curve, overlap, button placement, and seam allowance on a sample if the garment neckline is shaped or the fabric is bulky.
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.
Collar-to-neckline compatibility
Build the collar from the finished neckline seam
A collar succeeds when its attachment edge matches the neckline seam and its roll, stand and overlap suit the garment closure. The generator can create a shirt collar with stand, a stand-only collar or a flatter shape, but it cannot infer neckline balance or fabric behaviour from a cutting edge.
Walk front and back seam lines separately
Measure along the finished neckline where the collar will be stitched, excluding seam allowance and any section intentionally left open. Record front and back portions if the pattern provides them, then check the generated total against the complete garment neckline rather than a straight tape approximation.
Stand height changes comfort and closure
A tall stand frames the neck but needs enough circumference and shaping to avoid pressure. A low stand rolls more softly. Check the finished height against the wearer’s neck length, the top-button position and any jacket or sweater expected underneath.
Collar fall needs space to turn over the stand
The visible collar leaf travels over the stand and outer layer, so stiff or thick material increases turn-of-cloth. Roll settings shape this transition but do not replace pressing and undercollar control. Make the undercollar slightly responsive through construction rather than trimming the generated attachment seam.
Match collar ends to the placket relationship
Center-front overlap determines where collar or stand ends meet when the garment is closed. Compare the generated extension with the actual button and buttonhole plackets. A correct neckline length can still look wrong when the ends cross too far or leave an unintended gap.
Collar toile and paper check
Test the neckline and collar together before cutting final upper and undercollar layers.
- 01 Stabilize the garment neckline before measuring so handling does not lengthen the curve.
- 02 Walk the collar or stand seam against the neckline from center back toward both fronts and place shoulder notches from the garment.
- 03 Pin a paper or inexpensive-fabric collar to check neck comfort, end position, fall depth and interaction with the closure.
- 04 Fuse a layered sample to judge turn-of-cloth, edge thickness and whether seam allowances need grading after stitching.
- 05 Verify grainline, mirrored cut quantities, notches and the 5 × 5 cm print square before final cutting.
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.
Common questions
Collar pattern FAQ
Is the collar pattern generator free?
Yes. Enter the collar measurements, preview the generated pieces, and download SVG, copyshop PDF, or tiled A4 PDF without purchasing a fixed-size pattern.
Should I use neck circumference or neckline length?
Use the finished garment neckline length measured along the stitching line. Body neck circumference is useful context, but the collar must match the actual neckline it will be sewn to.
What is the difference between a shirt collar and a stand collar?
A shirt collar has a collar stand plus a separate collar leaf that folds over. A stand collar is only the band around the neck and does not include a fold-over collar leaf.
What is roll allowance?
Roll allowance gives the collar leaf extra room to fold over the stand without pulling. It matters most for shirt collars with interfacing or thicker fabric.
How should I print the A4 collar pattern?
Select actual size or 100%, disable fit-to-page scaling, and measure the 5 × 5 cm test square before cutting the printed collar pieces.
Workflow
01
Choose collar type
Start with a shirt collar with stand, a stand collar, or a flat collar preset.
02
Match neckline
Set neckline length, stand height, fall height, overlap, roll allowance, and seam allowance.
03
Export files
Download SVG, copyshop PDF, or tiled A4 PDF for 100% printing.