Base rnd, each side: Any multiple.
Begin in any stitch.
Rnd 1: Ch 1, sc in each st around, placing 3 sc in each corner st, turn.
Rnd 2: Ch 1, BLsc in each sc around, placing 3 BLsc in each corner st, turn.
Rnds 3–6: Ch 1, sc in each sc around, placing 3 sc in each corner st, turn.
Rnds 7–10: Ch 1, *sc in each st to 1 st before corner, sc3tog; rep from * around, ending sc in each st to end, join with slip st to first sc, turn.
Rnd 11: Ch 1, *[insert hook into next st and into back loop of next st of Rnd 1, sc these 2 sts together] to 1 st before corner, insert hook into next st and pull up a loop, insert hook into next st and into corner st of base round and pull up a loop through both sts, insert hook into next st and pull up a loop, yarn over and pull through all 4 loops on hook; rep from * around, join with slip st to first sc. Fasten off.
Make this folded three-dimensional border as wide or as narrow as you like, by repeating Round 5 and then Round 9 as many times as needed. Play with adding colors or textures to the plain single-crochet fabric shown here.
