DirSize 6.1 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This software is a product of DataMystic. DirSize.exe is the default file name to indicate this program's installer. The most popular versions of the tool 6.1, 4.8 and 1.1. The program is categorized as System Utilities.
From the developer:
Command line tool that can easily be automated to generate nightly reports of disk space usage, network space hogs and very large folder trees. Reports can be sorted and small folders can be prevented from being displayed. Both 32 bit and 16 bit versions are included, all support long filenames. Full scrolling support in either direction. Now includes HTML output option.
You may want to check out more software, such as Stellar Phoenix Mailbox Professional, S.M.A.R.T. Disk Monitor or Card Reader, which might be related to DirSize.