All of the Folsoms that I have seen are smaller. I don’t know if they are all that way. It is interesting how different styles would last a few thousand years and then suddenly a new style became prevalent. The largest Dalton points I have are about six inches long and the smallest are about three inches long. The largest stone spear point I have is a double notch Turkey Tail that is about eight inches long.
From what I understand it is all dependent on the time frame. Sizes started to get smaller as they moved from Megafuana to smaller game. And the progression from Spears to Atlatl and Darts to Arrows the same. Guess they had to make the weapons fit the game available as time went along.