Oh man, this is a good question and you'll never get a satisfying answer, lol.
So many factors involved that not even members of the same clutch develop at the same rate.
But, in my tanks, at 72f, and fed daily, crs and CBS take 4-6 weeks to get to 1/4 inch, and then another 2-3 months to breed. Same for tigers and taiwan bee.
Cardinal shrimp are much faster, they grow to breeding size in less than 3 months.