From the booklet:

A vine of leaves to circle your table and keep the freshness of spring in your dining room all year round.

Any one of the threads listed below are appropriate to use.

J&P Coats “Big Ball” Six Cord Mercerized Crochet (Size 20), Art. A 104
19 balls of: No. 1 White, or No. 61 Ecru, or No. 42 Cream

OR

Clark’s “Big Ball” Mercerized Crochet (size 20), Art. B 34
13 balls of: No. 1 White, No. 61 Ecru, or No. 42 Cream

OR

Clark’s “Big Ball” Mercerized Crochet (size 20), Art. 345
9 balls of White or Ecru