foundation chain: 185 st. (182 + 3)

border:
Base round + round 1 (color: gray): sc - 3sc in corner stitch
Round 2 (light blue): sc
Round 3 + 4 (ivory): sc
Round 4 (ivory): variation of attic24’s bobble edging:

work a Bobble-shell cluster, as follows:

yarn over, insert hook through stitch, yarn over, pull loop back through stitch (three loops on hook), Yarn over and pull through two loops in hook (two loops left on hook). Yarn over, insert hook through same stitch, yarn over, pull loop back through stitch (four loops on hook). Yarn over and pull through all four loops, as in two pictures above.

Sl st into 3 next stitches. Work next bobble shell cluster, sl st into next 3 stitches … repeat till the end
(for corners a 3cluster)