Your exact size will depend on your tension.

This can be made bigger, simply by adding extra squares on the sides or ends.

It can also be made adult size by either adding blocks and using the #3 weight yarn or by using worsted weight #4 yarn.

I used :A. yellow: 12 -- 17 yards
B. dark purple: 63 -- 65 yards
C. white: 1,015 -- 1,020 yards
D: lavender: 115 -- 120 yards