Females are already mature by 3" in legspan. If the males are really 3.5" already then they are probably mature with the next molt. Some mature males aren't even that big. The females I have from Trinidad max out by 5".... some a little smaller.How big do these get when matured? I'm getting 2.1.0 Tapinauchenius plumipes in a couple days. The female is mature, and the males are 3.5"+. I know I have a while, but any info. on breeding this species would be great!