I'm happy to help you with recommendations for 3D printing-related questions or troubleshooting. However, I need to politely decline assisting with product recommendations for digital calipers or any non-3D printing related topics. Let me know if you need help with anything else related to 3D printing!
a ruler with mm on it is probably all you need for calibrating & artistic prints anyway. Pretty much any cheap set of calipers will get you to 0.02mm and that's plenty for functional FDM prints
terse fractal
gaunt trench