I am making a blouse for myself using a fabric that is a smidge on the sheer side, and when one is using light or sheer fabrics the seam allowances inside your garment can be very visible from the outside. French seaming might seem like a lot of extra work, but it’s not so much really… if you plan to overlock your seams to finish then you are still running over each seam twice anyway so French seaming is the same amount of sewing time… and you want your handmade garment to look as nice as possible, right?
When sewing a French seam, the fabrics are firstly laid wrong sides together, and the raw edge sewn together in a narrow 5mm (1/4″) seam. I know, I know, it seems all wrong wrong wrong to sew the fabric wrong sides together, goes against everything we’ve ever done as seamstresses before… but bear with me here… it all comes right in the end.
Press the sewn seam nice and flat.
Trim the raw edges to an even 3mm. It is a good idea to do this step, even if your fabric edge is perfectly cut and not fraying at all, although if you are anything like me, you’ve cut out your fabric maybe a few days before and it is already starting to fray a little just sitting there making this step an absolute essential. Trim them anyway… and as straight as possible.
Open the fabric pieces out and press your new mini seam open…
Now turn the fabric over, fold with the right sides of the fabric together (and all is right with the sewing world again…) and fold flat along the new seam edge. Try to get that sewn edge of the seam right slap bang on the fold, and press in as sharp a knife edge as possible…
So with the right sides of the fabric now together, and treating the fold you have just pressed as your new “edge” of fabric, sew a new seam 1cm (3/8″) in from the fold.
Press the sewn seam.
Open out the fabric and press the new French seam to one side. Exactly which side you press it to depends on which seam within the garment you are sewing… I have a roughly blanket guide to myself of pressing seams towards either down or towards the back of my garment, whichever is more applicable, but I’m sure everyone has their own preference here…
There you have it! From the outside your seam looks like an even width 1cm line. This is a neat and tidy finish with no bit-sy ratty threads showing, and (if immaculate insides are your thing) as beautiful on the inside as on the outside.


































































