best way to join center rear

[Tarheel]

I did not understand until your last post. If you are going to use that seam as decoration and strength it will be good. Have you tried other fabrics?

Other members have used cloth from thrift stores to practice on before they made their kilts. There may be other fabrics that appeal to you for another kilt.

[The Wizard of BC]

Perhaps a photo of an actual fabric join will help.

If you are hand stitching - This is called a "Flat Fell Seam".





If you are machine stitching your kilt - This is called a "Sailmakers Seam".

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Please notice that both of these produce a seam where there are no raw edges of fabric to fray. A serger is not used to finish the edges they are folded in or stitched over depending on you method of stitching.

[pofloyd1]

I don't know what it is called but the third one can be sewn and then the leftover fabric is folded toward the backside of the sewn item and stitched twice for strength. This leaves a double row of stitching that shows on the outside of the sewn item.