I don't know how large of a quilt that you want to make but I have the yardage requirements for both the single and the double irish chain.
The following requirements are for the Double chain,
Baby quilt:
1 yard light, 1/2 yd. medium, 2/3 yd. dark
Lap:
1 1/2 yds light, 3/4 yds. medium, 1 1/4 yds dark
Twin:
2 yds. light, 1 yd. medium, 1 1/2 yds. dark
Double:
2 1/4 yds. light, 1 1/8 yds. medium, 1 7/8 yds. dark
Queen:
2 2/3 yds. light, 1 1/4 yds medium, 2 1/8 yds dark
King:
3 yds light, 1 1/2 yds. medium, 2 1/2 yds dark
I hope this helps! :D