Can someone give me a estimated cost of sending images captured on cell phones to a email account?

My wife and I finally upgraded our ATT wireless plan with new phones and have the ability to take pictures now. I am wondering what the cost of this might be using the smallest size image sent to my yahoo email account, can anyone suggest a estimated cost?
Can someone give me a estimated cost of sending images captured on cell phones to a email account?
Picture messages cost $0.25 per message sent or received regardless of the size of the actual message. International picture mesages are $0.50 per message in case you were wondering. Hope I've helped!