Blender Import Model unity 5 apply legacy model small and disappear almost

Model Blender Export in to unity 5.4 and apply legacy ,model small and disappear almost:

Or tried to import FBX files and file blend , either way you experience the same problem, or tried with other models the problem always OCCURS, the models are imported correctly into unity, but When You press the model will be small and legacy is almost disappear or tried with different version of blender from 2.74 to 2.78 or noticed this: If you export blender with version 2.74 the model once you import into Unity 5.4 when to apply legacy is only small. If you export with blender higher than 2.74 then 2.75.2.76.2.77.2.78 the problem worsens the model disappear completely.

Or even noticed this: if you export to FBX format and excludes the, not mark voice "NLA Strip" then the model When you import legacy unity and apply the model to maintain the correct size

to someone and never happened? you have any solution to the problem?