FREE Lamport Trousers sewing pattern

free sewing pattern woven trousers front

This trousers pattern is available for sizes up to UK 24 US 20 EU 52. It will work great with woven fabrics without any stretch and are so quick and easy to make. If you’re in between two sizes consider blending the sizes on the pattern to match your waist to adding belt loops. These trousers have concealed side zipper instead of the fly but you can modify the pattern and add a front zipper fly yourself 🙂

Sizing: If you’re not sure which size to choose, check the measurements charts

Printing and assembling the pattern:

Scroll to the bottom of the post to download the pattern, it’s available in A4 format (works also with letter format). You can turn off the layers in Adobe Acrobat and print just the one you want. It will be easier to see the correct lines. You can find the option at View -> Show/Hide -> Navigation Panes -> Layers 

Start with printing the first page and make sure the test box is 5 x 5 cm.
You can try printing on different paper formats but always select printing to 100%. Let me know if you have any issues.

Trim the pages and keep the inner boxes only (or overlap pages) so the star markings touch each other.

Whenever you can, make a toile before cutting through your favourite fabric.

Tape the pages as shown in the picture below.

Seam allowances:
1.2cm seam allowances are included. You can see them on the pattern itself.

Recommended fabrics:
Woven fabrics, jeans, linen, etc.

20cm zipper for the side opening, fusible interfacing

Fabric requirements:
Approx. 1.5m of fabric depending on the size. Width of fabric: 1.5m

Front x2
Back x2
Waistband x2 on the fabric fold

Instructions (this is my preferred method, you can do it differently):

Sorry if it causes any confusion, I made two pairs of trousers so in some pictures they’re blue and in others grey.

Apply interfacing strips to the wrong sides of the side pieces to the zipper side as shown in the picture. They should be about the same length as the zipper. Apply interfacing to the waistband pieces.

Close back darts and press with an iron.

The side without zipper: Pin outside leg seams together with right sides facing and sew together. Sew inside leg seams with right sides facing. Overlock or zigzag raw edges. Press with an iron.

Side with zipper: Sew inside leg seams with right sides facing. Overlock and press with an iron.

Insert one trouser piece in the other one with the right sides facing and stitch centre front and back seam in one all in one. Overlock or zigzag the edge.

Sew inner and outer waistband pieces with right sides facing to one side only (The side with the zipper remains open)

Sew the front (outer) waistband layer to your trousers with the right sides facing 1.2cm from the edge. Press open. Overlock raw side edge.

Sew the invisible zipper to the open side starting from the top. Then sew the trouser edges from the bottom.

Attach the inner waistband piece to the shorts with the right sides facing. Sew also to the side, on top of the zipper folding the seam allowance at the corner. Clip the corners and turn it inside out.

Fold the remaining seam allowance under and topstitch.
Tip: I used a tacking stitch first to make sure I catch the fabric underneath. That way everything will look neat from the outside.

Hem your trousers and enjoy your new pair 🙂


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