My preferred swimwear stitch.
Using the slant overcast stitch, num 8 on my Brother CE1100 machine. This stitch takes 2 stitches then overcast, then 2 more stitches, strong stitch and very stretchy,.
Great for swimwear or activewear. Using at the 7mm stitch width gives a scant 1/4 finished seam allowance, so great for a pattern with a 1/4 seam allowance.