Hey there :)
Lets us first change the words into mathematics
1 half → [tex] \frac{1}{2} [/tex] = 0.5
5 eighths = [tex] \frac{5}{8} [/tex] = 0.625
1 eighths = [tex] \frac{1}{8} [/tex] = 0.125
0.125 < 0.5 < 0.625
1 eighths < 1 half < 5 eighths
The biggest is 5 eighths
Second biggest is 1 half
The smallest is 1 eighths