The slit length drives both pieces
Tower and underlap are generated from one opening length so their attachment references stay coordinated.
Sleeve detail
Create a sleeve placket pattern
Generate a tower sleeve placket with a matching underlap strip, fold guides, slit placement, seam allowance, and print-ready exports.
Sleeve placket pieces
Generated example
A sleeve placket built around a measured opening
Tower and underlapThis standard example turns a 12 cm sleeve opening into separate tower and underlap pieces with a 3 cm tower, 1.6 cm underlap, and 3 cm point.
Widths remain editable
Tower width, underlap width, point height, and seam allowance are independent inputs rather than a scaled fixed template.
The live vector includes sewing edges, cutting allowance, fold references, and the tower point used to finish a shirt sleeve opening.
Export the exact placket as tiled A4 PDF, full-size PDF, or SVG.
Related guides
Generator
Basic sleeve pattern
Generate a sleeve block and check cap shape, bicep, wrist, and armhole compatibility.
DetailSleeve cuff pattern
Create a matching cuff with fold line, overlap guide, and button marker.
ConstructionSeam and hem allowances
Read solid seam lines, dashed cutting lines, construction seam allowance, hem allowance, curves, and corners.
Sleeve placket construction guide
Tower and underlap pieces calculated from one sleeve opening
The generator converts an opening length into coordinated tower and underlap pieces with editable widths, point height, folds, and seam allowance.
Tower and underlap
The export includes the visible pointed tower and the narrower layer beneath it, each with its own sewing and cutting references.
The sleeve slit controls the length
Choose an opening that allows the hand through the cuff area while remaining proportional to the sleeve and cuff depth.
Width and point are independent
Tower width controls the finished visible strip while point height controls the peaked finish above the slit.
The lower layer remains narrower
Underlap width is set separately so it covers the opening cleanly without duplicating the tower.
Test folding order and sleeve side
Mirror the detail where needed and test which side receives the tower before cutting the final sleeve pair.
Allowances and folds need full scale
Print at 100%, verify the test square, and transfer every fold and opening mark accurately.
Who, how, and when
Drafting logic by Nastix Design
This generator is maintained as application code: measurements are converted into vector geometry, related seams are measured numerically where the construction requires it, and the same geometry is used for preview, SVG, copyshop PDF, and tiled A4 PDF.
Generator content and output workflow reviewed 13 July 2026. A generated block remains a fitting starting point; verify measurements, print scale, fabric behaviour, and a test garment.
Common questions
Sleeve placket pattern FAQ
Which pieces are generated?
The export contains the tower placket and underlap with folds, sewing lines, cutting allowance, and opening references.
How long should a sleeve opening be?
It must allow the hand through and work with the cuff. Use the sleeve and cuff as context rather than selecting length by appearance alone.
Can I make a narrower tower?
Yes. Tower width, underlap width, point height, opening length, and allowance are editable independently.
Is the same placket used on both sleeves?
The geometry can be mirrored, but the tower direction and garment conventions should be confirmed before cutting paired sleeves.
Which download is best for home printing?
Use the tiled A4 PDF at 100% and measure the 5 × 5 cm square before cutting.
Workflow
01
Choose the placket
Start with standard, narrow, or long placket proportions.
02
Set the opening
Adjust opening length, tower width, underlap width, point height, and seam allowance.
03
Export full size
Download SVG, copyshop PDF, or A4 tiled PDF at print scale.