When I import an OBJ file to Studio it is so small or nonexistence,no matter what size i set it to. I've tried all the offered sizing i think.if any more info is needed ask. I'm using Studio 4.9 Thank's

Where are you getting the OBJ file from? When I import from an OBJ file I exported from Blender I set it to "Custom" and a scale of "5000%." But that would depend too on what size/scale you had, and/or exported it from, in Blender. So it really depends upon on how the OBJ was created and saved.

erock2017 thank's mostly out of other programs and the net ,maybe I could go through blender,usually bryce.

So this is happening to multiple OBJ files that are coming from more than one source? Does this happen to every single OBJ you import into Daz Studio? If you tried every one of the listed program configurations, one of them should have at least worked size wise. I referenced Blender just to state that I have to use a large scale increase, 5000%, for it to be the proper size for my imports. Some of those listed program formats that Studio offers though are even larger in scale.

The only other thing that I can think of, and it may not be related because it doesn't have to do with size... but you did mention "non-existent"... and that is that sometimes you need to go to the surfaces tab and adjust the "Opacity Strength" in the shaders to 100% to make the model visible. For some reason, some of the OBJ files are imported in to Studio with the opacity set to 0%. I've even had this happen on OBJ files I purchased here on Renderosity. Again, this might not be the issue, but it is the only other reason I can think of that it would be non-existent on import.

Other software genereated .objs can come in at very strange sizes. If you can export the object with scaling to daz studio it will be fine other wise you need to fiddle with the percentage size on the import dialogue in daz studio. its not unusual for things to need to be scaled to 1000% or even higher, thats fine, it just re sizes it to the daz studio universe. It is a bit of trial and error but once you work out the percentage you need to use with the objs your importing youll be fine. Its worth having a play.