Restriction of file upload size for a Site

Issue

Can we set the upload size limit for a Site instead of the complete portal? For example,
- Can we set the file upload size limit to 20 MB or more on a site while setting 10MB for portal wide?

In Quarterly Releases and 7.4, a new configuration have been added, allowing to modify the custom size limit through the Control Panel for any scope:
- System and Instance scopes: Control Panel →System or Instance Settings →Documents and Media→File Size Limits
- Site Scope: Site Settings →Documents and Media →File Size Limits
For 7.3 and below, the upload size can be set at the portal level and not at the site level, as default upload size is portal scoped and not site scoped.
For Liferay DXP 7.1 and up, the portal-level Upload Servlet Request Size is set from below path,
- Go to Control Panel→ Configuration→ System Settings→Infrastructure→Upload Servlet Request. (Please refer the below image for the same)

In DXP 7.0 and below, we can set the upload size at the portal level by following the below steps.
Control Panel→Configuration→Server Administration→ File Uploads (Fileupload.png for reference)

By default, the file upload limit will be 10 MB which can be changed according to your business requirements by following the above steps. The size should be given in bytes. Default is 1024 * 1024 * 100
Web content upload sizes can also be set through portal-ext.properties.
LPD-6246 - Limit file size in D&M for sites and mimetypes