Universal Adapter Sizing Chart

Please see the chart below for detailed fit information on our Universal Adapaters. You can download a PDF copy by clicking the link below.

Download Sizing Chart PDF


Measure the outside diameter of your diopter and/or your objective housing using an accurate measurement tool. (ex. Vernier caliper) Select the appropriate size from the chart below.

Please note: Should your selection fall at the upper range of one fit and the lower range of the next size up, choose the fit that falls closer to the upper range as opposed to the next size range up.