Scale error when entering in the game mode

i created assets by using MAX2009

before i export the assets, i reset all scale and rotate through x_form,

and also i changed the units to meter on the unit set up screen.

After that i brought all assets through unity 3d and loaded to the scene screen.

But the problum is some of assets that i loaded get smaller once i start the game mode.

is it software error or the setting problem?

Under Assets > ImportedMeshes> “your game asset”

Under model section, check your Scale Factor, make sure its 1.
See if that helps when you press “play” for game mode.