THE most accurate way to ensure the perfect fit of your JBJ ring is with a JBJ custom ring sizer.
This is primarily because sizing standards and measurements vary across different countries and not all measuring tools (calipers, mandrels, etc.) are created equally. Our custom sizers are based on our tool's measurements and machining specs, so when you find your perfect fit with a custom JBJ ring sizer, we will be crafting your finished item with the same measurements for width, internal diameter, etc.
Apr 3, 2025