As there are no "standard commercial" licenses (see also Commercial licence deproliferation attempts), there is also no standard license combination for a OSS+Commercial dual license.
I know of at least one successful project that uses a OSS+Commercial dual license: The Qt project.
From their licensing page:
Qt for Application Development is dual-licensed under commercial and open source licenses. The commercial Qt license gives you the full rights to create and distribute software on your own terms without any open source license obligations. With the commercial license you also have access to the official Qt Support and close strategic relationship with The Qt Company to make sure your development goals are met.
Qt for Application Development is also available under GPL and LGPLv3 open source licenses. [...] The Qt open source licensing is ideal for use cases such as open source projects with open source distribution, student/academic purposes, hobby projects, internal research projects without external distribution, or other projects where all (L)GPL obligations can be met.
When using a OSS+Commercial dual license, it is usually best to choose a copyleft license for the OSS side, because that ensures there is no (or less of a) loophole for commercial users to use the product without paying for the commercial license.