https://download.kiwix.org/zim/README

Mini is the introduction and infobox of all articles, nopic is the full articles with no pictures, maxi is full articles with (small) images. Other tags are categories (football, geography, etc.)

100 is the top 100 articles, top1m is top 1 million, 0.8 is (inexplicably) the top 45k articles.

My recommendation: sort by size and download the largest one you can accommodate in the language you prefer. wikipedia_en_all_maxi_2025-08.zim is all wikipedia articles, with images, as of 2025-08 and it's a paltry 111G.

Kiwix publishes a library here, but it's equally unhelpful: https://library.kiwix.org/