The size is depending on which yarn and hook you use, as well as what tension you crochet with. This is an example of how
mine turned out with this yarn and hook.
Size of my shawl before blocking (with the Scheepjes Whirl):
Tip-base: 143 cm / 56,3 inches
Base: 93 cm / 36,6 inches
Diagonal (side with the clovers): 182 cm / 71,7 inches
Link to downloadable pattern is below!
Free Crochet Pattern by Agneta Nauclèr
Downloadable pattern is here.