8X10 Oil on Masonite.
If you have interest in buying this painting you can click on the auction link below.
I've had this glove for almost 30 years...it's an old Rawlings with Willie Stargell's signature on the inside. If you know your baseball, that'll tell you how old it is. It's so "broke in" I used to call it the rag. I used to use it as my softball glove and have never been able to let it go.