Scale relation between blender and Unity

Using Unity version 5.5
So I have a cube in Blender which has :
Dimensions = 1 ,1 , 1
Scale = 1 , 1 , 1
In Unity i have a default unity cube added to the scene which has :
Scale = 1 , 1 , 1
So now in i export the Cube from Blender to Unity and it has :
Scale Factor = 1
So as i have seen in many Q & A sections in the Unity Forums, 1 unit in blender = 1 unit in Unity
That means the cube which i have in unity must perfectly match the cube imported from Blender
But instead the cube in Unity doesnt match the cube imported from Blender when the imported cube's scale is 1 , 1 , 1
Both the cubes match each other perfectly when the imported cube in having a scale of 100 , 100 , 100
So wasnt the scale unit ratio between blender and Unity supposed to be 1 : 1??
Then why does the imported cube match the default unity cube only if its scale is 100 , 100 , 100 ??
Someone pls help me understand this scaling system
This system is totally confusing me
Is it just a mistake in my Unity or am i mistaken??