This free pattern originally published in the Woolco Knitting & Crocheting Manual, in 1916.

With hook No. 3 make a chain about 2 inches longer than required. Into the 5th stitch work 6 treble crochets. *Skip 3 stitches, 1 single crochet in next, skip 3 stitches, 7 treble in next stitch.* Repeat between stars the length of chain. Turn, chain 3.
2D ROW-1 double crochet between the 1st and 2d treble, 2 chain, 1 double crochet between each treble, 2 chain, 1 single crochet, on single crochet of last row, 2 chain.* Repeat between stars to end of chain. Turn, chain 4.
3D ROW-Make a single crochet with 3 chain between in every chain of last row.
Other great edgings patterns from Woolco Knitting & Crocheting Manual.