I don't think that Safari Prefs let you choose the default font size, only the minimum. You can, however, change the default font size via the Safari tab of TinkerTool (free).


Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365