I didn’t block Crochet Lace Doily, but you certainly could block yours. Below you will find some information on blocking as well as a helpful pdf blocking template.
To make this doily I used cotton thread size 10 and a 2 mm crochet hook. Its size (unblocked) is 18,5 cm (7,3 inches) in diameter.
Besides your chosen thread and crochet hook, you will also need a needle to weave in loose ends and a pair of scissors.
To stiffen the doily you will also need your favorite stiffener, stainless steel pins (or toothpicks), plastic wrap and some kind of foam/blocking board.