Object Changes Size [Please Help]

Hello! I thought maybe I should create a new thread for this object. I don't know why the object became larger than the one in blender. The object on the right is zoomed out. What should I do? Thank you! >.<

Edit: I did the conversion again from scratch and I still get the same result. Shrinking the object doesn't make any difference.

Is there a similar problem like this have been solved? Where can I find it?

Here's the package: www.sendspace.com/file/ai2w0u