is it a commercial pattern? i've never run across one that did not have a material list???
there are books available that tell you things like how many squares you can cut from a fq or yard of fabric- i would check the tutorials list & see what you can find- but look over that pattern again- somewhere it has to tell you what materials you need- which will tell you how much of each-
you can get 12 (5") squares from a fq.--3 across- 4 down= 18"x21"
you can get 56 (5") squares from a yard (36"= 7 (5") squares x 42"= 8 (5") squares = 7x8=56