How big does a female savannah need to be to safely produce eggs?

My male is definitely ready, as he has hooked up with a Tegu before.

I have two females, and I think one of them is probably big enough, but I cannot find any information on what the minimum length or weight should be.
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Ball Pythons:
1.2 Normal
1.2 Pastel
0.1 Black Pastel
2.0 Het Orange Ghost
0.1 Orange Ghost
1.3 Mojave
1.2 Spider
1.1 Albino
0.1 Het Albino
1.0 Piebald
0.1 Double het, Albino Pied
0.2 50% Het Orange ghost
Other:
0.1 Irian Jaya x Jungle Carpet python
1.0 Jungle Carpet Python
1.0 Tiger Retic
1.1 Burmese Pythons
1.1 Brazilian Rainbow Boas
3.4 Corn Snakes
1.0 American Alligator
1.0 Savannah Monitor
0.0.1 Argus Monitor
1.0 Chinese Water Dragon
0.1 Brown Basilisk
0.1 Ambanja Panther Chameleons
3.4 Crested Gecko
0.1 Sulcata Tortoise
1.1.1 Sugar Gliders
1.1 Puppies