I went out and measured the oars and locks for the ones I have. These came off of one of the highest end pontoons out there, and since I've 'repurposed' the boat, I do not need them. Google for "Fishcat Cougar" to see images of the oars and locks.
If you're replacing the oars and locks with ones that are meant to be together, I don't see where any of this matters except the pin width and length, but here you go:
84 1/2" length.
ID at widest point of the inside of the lock is 1 13/16.
Pin length is 2 5/8" total, but is shimmed on mine with UHMW bushings.
1/2" pin width.
These are the straight blades, but can be swapped out for other styles. The oars have a plastic sleeve, where it contacts the lock, probably UHMW. I was thinking earlier that the actual oars were oval in shape, but was confusing that with one of my kayak paddles. Looking at it again, these are round. They do not come out of the locks once slid down where the plastic sleeve is meant to ride. If you're really worried about an ohshit moment, you might consider a small locking clevis pin installed at the opening of the locks.
If this would work for you, you're welcome to pick them up and try them out.