Please take note that the diameters for the butt section of all our blanks can be found on the product page for each blank under the "specifications" tab.
When it comes to measurements for a winding check, it's important to consider various factors such as grip length and fighting butt options etc etc.
For accurate sizing, we recommend waiting until your blank or kit arrives, dry assembling it, measuring it, and then ordering the correct winding check from a rod-building supplier. This approach ensures that you get the best fit for your specific rod-building needs.