11/32". Eleven thirty secondths of an inch diameter. 0.34375" (or 22/64" is the same as 11/32")
A "bullet" type of head, as opposed to a "field point" will be easier on yer target an help it last longer.

 

Great information! Thanks so much!

 

Bullet points will not penetrate the target as deep and there fore are easier to remove from the target.
Field points penetrate deeper into the target but do not damage the target cover like bullet points.

Wishing you all the best.
Take care.