One does practice enormous half speed, the results you get may be only slighter better than if you did not practice any kind of. Once they seem all set (and a little tired), switch them a few knock out drill. Fastpitch softballs are slightly larger than baseballs and may be 11" or 12" in length. https://groups.google.com/g/top-rated-baseball-gloves-for-pitchers/c/4YyM_keJUmc