You are correct in that I should have provided a size reference. I intended to but forgot when I took the pics. They are 5" long from tip of point to the tweezer end and approx. 7/8" across the blades of the tweezer end.

I did some thinking over the last day and remembered that this guy was a serious fisherman, mostly bass but he may have done some fly fishing too. I wonder if these were used in tying flies. What do you think?