This is an older style fork with horn from the original pre vps (2008) western range. It is very heavy in comparison to the newer pommel horn available now. I believe it would have been the standard wide, but I do not know for certain.
These days Barefoot have made it easier by having the fork sizes in different colours. There is also a simple and cheaper option of just buying the soft pommel. You can leave it as it is or pop the velcro horn on. No need to worry on getting the sizes spot on.
Does anyone recall what the wood was made from?
Treeless Saddles and Bareback Pads 