sleek,
Seems every time I throw in my two cents....it gets real ugly real quick. Here are photos of the ones I use, they are patterned and sized from actual artifacts of this area. They dont seem any smaller than your example. I've killed several deer with them, one arrow each, and no long trails. The DNR Regional Commander said they are perfectly legal as well.
The last 2 pictures are artifacts from a dig in OHIO and they are smaller than mine or yours.
I dont consider myself unethical, and would not use them if I thought that they were.....but the final decision is yours to make....get close, shoot well, the head will kill cleanly.
rich