FYI, I did try Document Printer with throwing a bunch of commands on a print template. All I did was change my printer to Document Printer and it printed perfectly. So… you could have circles, but I think the boxes are just as good. Here is a pic, HTML printer on the left and Document Printer on the right.
Document Printer Object Info:
Center Text in a WPF XAML Shape: Paul Sheriff's Blog for the Real World - Centering Text on a WPF Shape
WPF Shapes and Basic Drawing: Shapes and basic drawing overview - WPF .NET Framework | Microsoft Learn
XAML Syntax: XAML Syntax In Detail - WPF .NET Framework | Microsoft Learn