For the "round" shape that you describe there is a company called "top ten" who do amateur gloves that have a nice round shape.

What Chris said about Cleto Reyes gloves is true, they are the most comfortable. However, they are particularily unforgiving on the opponent.

Everlast do a nice "round" glove aswell. Grant are good for protecting the hand (which I feel is the reason Calzaghe has started to use them over everlasts.)

Ergo are aquality glove, a brand i lust over, but are not particularily suited to the small hand.