koobas.hobune.stream
Imported models from Blender 2.77 are scaled x100 in Unity 5.3
Using a completely new scene with the standard 2x2x2 cube. When I choose "Selected objects" .fbx export from Blender and open the model in Unity the X,Y,Z values are each scaled by a hundred. But the cube appears in Unity as if it was 2x2x2m. Trying to rescale in Unity from 100--->1 ends up with a ridiculously small cube.
How do I export a model from Blender to Unity and keep the scaling right?
As of 2021, the solution seems to be here. In short, export FBX Apply Scaling: FBX All.
This was bugging me for a while. I eventually found an option in the export options that solved the problem for me. 
After disabling this little button above, I no longer see the 100x scaled transforms and I can export & import at scales of 1.
Update (May 2018): This option appears to be removed in the current version of Blender (v2.79). Instead you should check the box for "EXPERIMENTAL! Apply Transform". Unfortunately this only works for one generation in the hierarchy, i.e. don't expect grandchild transforms to work when imported to Unity. 
If you have done everything correctly in Unity and blender, and you are having scaling issues, this is the correct answer. I too can confirm this works. Thank you!
Hello. I tried this solution. It seems that it works for Unity 5, but does not work anymore in Unity 2017 for some reason. Have you guys found a workaround?
I found solution for Unity 2017: Blender:
Export -> fbx
Button next to scale -> on
Apply scale -> FBX Units scale
Your answer is spot on, and is the method I've been using to get the correct scale from Blender to Unity!
From my own experimentation, checking the !EXPERIMENTAL! Apply Transform button will work most of the time, however, if you have more then one layer of child objects (one child parented to another child that itself is parented to the root object), the rotation of all the child objects will be horribly maimed.
To solve this without checking Apply Transform, instead ensure that the scale button is unchecked, and the Apply Scalings drop down is set to FBX All.
For me this is the way, when you are exporting e.g. an Armature to Unity. The original answer is really only good for single level objects. (Unity 2019.4, Blender 2.8.3)
This is how I import models from Blender to Unity:
Export from Blender
Select all models (also the rig if it is there) and make sure they are in object mode.
Rotate all objects: X axis -90deg. Apply the rotations.
Rotate all objects: X axis 90deg. DO NOT apply rotation.
Export > FBX and set the following:
Scale: 1, the button next to it should be active.
Apply Scale: FBX Units Scale
Uncheck !Experimental! Apply Transform (It does not work properly)
Import in Unity
Make sure the "Preserve Hierarchy" is checked in the Model tab.
Confir$$anonymous$$g this exact process works perfectly for me using Blender 2.9 & Unity 2020.2.1f1.
Apply Scale: FBX All
I'm not actually sure if there's a way to do it with the import settings, Unity automatically changes the scale to compensate as you've seen. If you need to get rid of it or it just bugs you there's always the option of blowing it up in blender by 100x before export.
Just scaled everything X,Y,Z x100 and used "Apply --> Scale". Works great
