Scale problem after skp import

I ‘ve done a simple stairway 36" width and save it into a skp file.
On another skp I put some walls and want to import the stairway : It is now 36’ width
The length unit is decimal feet
What can I change to have the correct size ?
When I measure it into stairway.skp the size is 36"

Very strange behaviour…They both are sketchup files !

Found my problem, I had to purge for old component :smiley: