While there are many ways to make a Ribbed Crochet Border, one of the easiest ways is using the back loop single crochet stitch. Now beginner crocheters can learn how to create a beautiful border for any of their projects.
Border Width: You don't add extra rounds to the crochet ribbed border, so you want to make sure you have the width you want for your project when you make the starting chains.
Hook Size: Make sure you are using the same hook size when creating the ribbed crochet border as you did for your main project.
Yarn: You can make this border with almost any yarn size, just make sure its a smooth texture (not blanket or something fuzzy)
Instructions
Step 1: If your project is not already made in the round, make a round of single crochets as a base. Each corner should have 3 sc.
Step 2: Join the yarn you want for the border anywhere on the edge of the project. Ch x6 or however long you want your chain to be - this will be the width of your ribbed border.
Step 3: In the second ch from the hook make a sc. Sc the rest of the way down the chains. * Sl st in the next available sc on the edge of your project, then make a sl st into the next one (2 sl st total).
Step 4: In blo, sc up the ribbing again until you are at the top (5 blo sc for me since I started with 6 chains). Ch x1 and turn. Blo sc back down the ribbing until you reach the base of your project.
Repeat from * until you reach a corner.
Step 5: In the first of the 3 corner sc stitches, only sl st 1 time if you can, if not that's ok, just make sure you start the corner with a sl st in the 1st stitch. Blo sc like you have been, ch x1 and then come back down.
Sl st to the middle sc, blo sc up and down 3 TIMES into the middle stitch. Each time only making a single sl st before going back up.
Once you have done that 3 times - sl st into the last corner stitch and go up and down once more.
Now lay the corner on a flat surface and see if it lays flat (it should) but if it is curling up because of a tighter tension, you need to undo the last ribbing and work a 4th ribbing into the MIDDLE stitch and then proceed onto the last corner stitch.
Step 6: Repeat the ribbing and corners for the rest of the round. Make sure when you're doing the sides that you sl st 2x and for the corners you sl st 1x between each row of ribbing. Then sew the beginning and end rows of ribbing together to make it look seamless and continuous. Weave in the ends.
And now you know how to make the ribbed crochet border using single crochets.