So when converting files in TrueSizer, when the message box pops up that says PES Save Option->PES version->Hoop Size
the version is PESV6.0 and the Hoop Size has options of 100x100
180x130 etc and the option for user defined. I've just been leaving it as is (100x100). Is that correct? I'm pretty sure this is something relatively easy but I am the queen of questioning everything (much to my family's dismay).