Small, but the straps themselves are the same. I didn't think so but they actually interchange. Bearing diameter of the joints themselves are the same, differing in the joint overall diameter. Learn something every day.
Thanks for the reply. Hope you can help.
Just checked a large strap on a small flange. About 1/32 difference in centerline of the holes. I can file or drill the straps slightly to use a large strap on a small flange.
It'll help to get the date codes I need!