The picture looks like an 8 or 9 inch round pan. I think either of those would be safe bets, and if yu have a springform, I would use that. In either event, make sure you start checking the cake 15 minutes before the time suggested in the recipe because depending on which size you use, if it's different from the one used in the recipe, your cooking time will be different.
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http://www.joyofbaking.com/PanSizes.html