FBX files have an astonishing range of sizes. The Miku Lite came in at ~2500% scale. I've just imported a free plant-pot / urn at ~5% scale, chest-high-ish on LaFemme.

https://sharecg.com/v/94693/browse/5/3D-Model/Potted-Plant-Model

Really, I wanted to play with its normal map, which Poser can use for displacement rendering. Steep Learning Curve ensued. Eventually, I got a fair Firefly render, but Superfly came out fuzzier than the posing preview. Probably my bad...

Also, I must read up on using my twin GPU cards for 'clever' renders. CPU option, which is fastest for simple renders, maxed-out my PC's 8 cores for the plant-pot's displacement stuff. Which meant I had to take a leisurely tea-break while it worked...

This FBX model was well made, but many are not. Beyond a nasty propensity for FBX files to 'implode' or 'explode' on import, I am really, really annoyed by the number of models that seem to lack any internal structure. They are not ONE prop, they're not even this model's POT and PLANT. They're a heap of independent parts flying in loose formation. You gotta use the Poser hierarchy tree to multi-select such to delete the model. Else, like C&W song, 'One piece at a time', it takes a while...

"Huh ? Am I imagining this ??" One 'gotcha' with some FBX import is that the model's 'animation' flag may be set. I'm shaky on the terminology but, unless you notice and set 'loop' off, Poser response may become slo-mo, while camera v-e-r-y s-l-o-w-l-y pans away. And, sometimes, slants, too. Big clue is any flickering FBX texture...