MIZUNO Mizuno First Base Mitt I'm not sure of the exact details, but it's slightly larger than a standard first base mitt, and I think it could also be used for softball. It has been stored at home since I stopped using it. (The ball in the image is not included.) I may not be able to provide detailed descriptions of every aspect. Please refer to the images and make your purchase with your understanding. To prevent product substitution, returns are not accepted, so please be aware of this beforehand.