I made sort of 1 that I had seen on a friend's wall. It was a ring of gold metal 6-8 in. across then using "ocean" "sand" colored rough yarns wrapped the edge with rope looking yarn &filled in the ring(up & down- not side to side & glued on the shells. The ends of yarn hung below in various lengths to look nice. DIL was thrilled to have it for her new home. She loves the ocean! Sounds like you want the whole thing covered so I would cut a 1/4 or 1/2 in. thick circle of wood & glue it to foam & attach it with wire to the Syrofoam wreath ring. Use foam ring to pattern the wood. When attached to foam , perhaps you could spray paint the wood & foam sand color before you add shells so it looks very beachy! Have fun! Jan

I made one but I used grapevine.I made a beachy wreath,so grapevine looked good,I even draped netting over part.Turned out really pretty