I know, & I get that...but newly-hatched snakes that don't naturally crave mouse pinks but rather lizards that "fit" are both a challenge & a risk, so make sure the breeder or source has them eating pinks, because if it's shipped to you (or even just because it's re-homed) many snakes go thru a set-back of not wanting to eat. As far as the size of these (either one) as hatchlings, they're as big or bigger than corn snakes. "Tiny" for those used to BPs, but not so tiny as they could be. (I've raised 7" glossy snakes too, so it actually COULD be worse, lol.) If BPs are "noodles", then these are "angel hair pasta".
BTW, my spotted loves & uses a humid hide a LOT, so plan to use one. I do not otherwise regulate the humidity in her tank, & because of the warmth, it does dry out, but she sheds perfectly as long as I keep her humid hide damp. I'm sure this applies to Children's too. BTW, Children's pythons are so-named for the last name of the man who found them, it's not a "recommendation for ownership" though they do seem to make good pets anyway.