Important frogs use the same size, if the female is very large, very possible that the male morning dawns within the belly of the female ..
I use minimum 2 males for every female. The female must be in perfect health and have a good weight.
Use 1-1 can be risky if the male is not ready, a loss of spawning.
I lost a 800 spawn eggs C.aurita for that reason. Now I must wait 2 months for reuse that female again.