Hello! I have a Simblr called toxxicsims and someone mentioned that maybe you could help. I've been trying to convert an outfit from toddler to infant but I can't get the arms and legs right. Did you use a tutorial? Basically mine ended up with the arms being too skinny and the ankles clipping because I can't get it to fit on the infant body.
Hey! I converted one thing from toddler to infant so far, because conversions involving arms, legs and necks scare me haha. What I did was using a nude mesh for infants (top and bottom or alien nappies), delete all the visible body parts from the thing I want to convert, append the nude mesh and adjust the converted outfit to it.
I don't know how other people do it, but it worked for me somehow :D
Hope this helps a little, good luck!