For a perfectly matching bind-off, use the Double-Chain Bind-Off.In-Pattern Bind-Off for 1×1 Rib
This bind-off a particularly good choice to use on a project like a 1×1-ribbed scarf where you want the scarf to lay flat but you don’t really need it to stretch.
Also, if you want to seam a piece of ribbing to another piece of ribbing, this would be a good bind-off to use before you seam the pieces up. This bind-off, like many bind-offs in this section, is reversible.
That’s because when you bind-off doing 1×1 rib, the chain of bound-off stitches lays flat along the top of the work, making this bind-off essentially double-sided.
You can do this bind-off on any fabric to make the edge lay flat.
Used on Stockinette stitch, this bind-off has more relative stretch than it does on ribbing.Italian Tubular (Invisible Ribbed) Cast-On for 1×1 Rib
Matching bind-off: Invisible Ribbed Bind-Off for 1×1 Rib.Slipknot (Buttonhole/Jeny’s Stretchy Slipknot) Cast-On