To give you an idea of the potential size reductions, here are some benchmark results for compressed Windows 7 64-bit ISOs:
A standard, official Windows 7 64-bit ISO typically ranges from 3.0 GB to 3.2 GB Microsoft Learn Size of windows 7 iso files - Microsoft Q&A windows 7 64 bit iso highly compressed new
Keep in mind that Windows 7 is an older operating system, and Microsoft no longer provides mainstream support or security updates. To give you an idea of the potential
, with hundreds of features, drivers, and language packs removed to reduce the installer size to roughly 500MB–700MB. Risks of Compressed/Modified ISOs with hundreds of features