Is there a provision to change size of FlSpot?

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Currently, I am using FlSpot to mark points on data in the chart. but those points are too big. I want to make the spots smaller.

LineChartBarData(
          dotData: FlDotData(show: true),
          barWidth: 1,
          color: Colors.blue,
          spots: [FlSpot(sPeak.toDouble(), windowEcgData[sPeak])],
        ),

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 LineChartBarData(
          dotData: FlDotData(
              show: true,
              getDotPainter: (spot, percent, barData, index) {
                return FlDotCrossPainter(
                  width: 1,
                  color: Colors.blue,
                );
              },
              ),
          barWidth: 1,
          color: Colors.blue,
          spots: [FlSpot(sPeak.toDouble(), windowEcgData[sPeak])],
        ),