Stats

Z, 7 years old: 
53 1/2 inches (100%ile)
73 pounds (98%ile)

C, 4 years old: 
43 1/2 inches (98%ile)
44 pounds (94%ile)

L, 4 years old: 
42 inches (84%ile)
42 pounds (89%ile)

N, 4 years old: 
39 1/2 inches (31%ile)
32 pounds (12%ile)

For comparison, Z at 4 years old: 
43 1/4 inches
49 pounds

And C/L averaged at 3 years old (compared to N now): 
40 inches
38 pounds