As per pattern info:

Approximate Size 82 inches by 102 inches.
(For a Full Double Bed Size)

To make a full size double bedspread use: 24 skeins of Ivory or White Lorraine Boilproof Crochet and Knitting Cotton, Article 50, or 36 skeins of any desired color. 1 Steel Crochet Hook, Standard Size 3.