Minimum size?

[Argentra]

I have heard that you should go by the three 3's: 3 years old, 3' long, and 300g.

I would stick by that 300g one, but the other two are open to debate since I've seen some girls that were big enough at 2 years, and others that still were too small at 4.

But, since corns are prone to being egg-bound, I would err on the side of more weight.