if you hover over it it will probably say it, if not try downloading a file viewer of some sort
Details view
In Windows the File menu allows you to view file characteristics
The is SketchUp's backup file. You will need a copy of SketchUp to view the file. If it won't open then rename the extension ".skp" and it should open.
impact file size and file format will have on saving sequences
Windows Explorer allows you to view file characteristics. To access this, click on All Programs, Accessories, Windows Explorer. This brings up a menu of files. Right click on the file you would like, and click on properties to view file characteristics.
Depends on the compression type, but for most the common ones use a program like winRar to extract them back to normal size.
How to Increase Outlook PST File Size
You can determine the file size of an audiobook by checking the properties of the file on your computer or device. The file size will be displayed in bytes, kilobytes, megabytes, or gigabytes depending on the size of the file.
Max Initial File Size, Max Polite File Size
The file size doubles.
File compression
Q: What is the recommended size for the boot file system? A: The /boot file system is recommended to be 50MB.