Illustration of 7zip-tan stepping on a cardboard box labeled .7z, smiling mildly, with a knife cutter tooltipped 'Extract'. Surrounding are insets of Windows XP drive icons, exe file entries, the 7-zip logo and aliased text, the menubar..

7zip-tan herself is wearing a short-skirt dress that's thick like a coat and modern in design, with one diagonal crossing over it to have black half torso above and white half skirt below, and one giant zipper along the diagonal. Their long straight hair and their boots are also black-white. They're holding a folder on the other arm.
They're a skinny type woman with white skin.