In order to get the correct drum head size for your instrument, we recommend that you send us the drawing of your shell, this will ensure the best fit possible.
First step, is to remove the old head.
Next, draw the outline of the shell, please use cardboard for best results.
Finally, mail us your template along with your order #, this way we can provide you the best possible fit for your specific drum.
Our mailing address can be found here, in our contact us.
You can also take the correct measurement across (diameter) at this point, if you do not wish to mail us your template.