Morris.Donut({ element: 'graph', data: [ {value: 70, label: 'foo', formatted: 'at least 70%' }, {value: 15, label: 'bar', formatted: 'approx. 15%' }, {value: 10, label: 'baz', formatted: 'approx. 10%' }, {value: 5, label: 'A really really long label', formatted: 'at most 5%' } ], formatter: function (x, data) { return data.formatted; } });