These fit the bell end of ShopVac ports. The orange picture is my Rigid TS2400-1 tablesaw and the other is a ShopVac hose connector.
Small end OD 2-33/128", ID 2-1/16"
Large end OD 2-59/128", ID 2-5/16
There are 4 ribs on the inside of the large end - rib to rib ID 2-11/64