diff --git a/src/Spout/Writer/Common/Manager/ManagesCellSize.php b/src/Spout/Writer/Common/Manager/ManagesCellSize.php
new file mode 100644
index 0000000..44cf2a1
--- /dev/null
+++ b/src/Spout/Writer/Common/Manager/ManagesCellSize.php
@@ -0,0 +1,66 @@
+<?php
+
+
+namespace Box\Spout\Writer\Common\Manager;
+
+
+trait ManagesCellSize
+{
+    /** @var float|null The default column width to use */
+    private $defaultColumnWidth;
+
+    /** @var float|null The default row height to use */
+    private $defaultRowHeight;
+
+    /** @var array Array of min-max-width arrays */
+    private $columnWidths;
+
+    /**
+     * @param float|null $width
+     */
+    public function setDefaultColumnWidth($width)
+    {
+        $this->defaultColumnWidth = $width;
+    }
+
+    /**
+     * @param float|null $height
+     */
+    public function setDefaultRowHeight($height)
+    {
+        $this->defaultRowHeight = $height;
+    }
+
+    /**
+     * @param float $width
+     * @param array $columns One or more columns with this width
+     */
+    public function setColumnWidth(float $width, ...$columns)
+    {
+        // Gather sequences
+        $sequence = [];
+        foreach ($columns as $i) {
+            $sequenceLength = count($sequence);
+            if ($sequenceLength > 0) {
+                $previousValue = $sequence[$sequenceLength - 1];
+                if ($i !== $previousValue + 1) {
+                    $this->setColumnWidthForRange($width, $sequence[0], $previousValue);
+                    $sequence = [];
+                }
+            }
+            $sequence[] = $i;
+        }
+        $this->setColumnWidthForRange($width, $sequence[0], $sequence[count($sequence) - 1]);
+    }
+
+    /**
+     * @param float $width The width to set
+     * @param int $start First column index of the range
+     * @param int $end Last column index of the range
+     */
+    public function setColumnWidthForRange(float $width, int $start, int $end)
+    {
+        $this->columnWidths[] = [$start, $end, $width];
+    }
+
+}
diff --git a/src/Spout/Writer/Common/Manager/WorksheetManagerInterface.php b/src/Spout/Writer/Common/Manager/WorksheetManagerInterface.php
index bb54ee6..bb6758a 100644
--- a/src/Spout/Writer/Common/Manager/WorksheetManagerInterface.php
+++ b/src/Spout/Writer/Common/Manager/WorksheetManagerInterface.php
@@ -11,6 +11,29 @@ use Box\Spout\Writer\Common\Entity\Worksheet;
  */
 interface WorksheetManagerInterface
 {
+    /**
+     * @param float|null $width
+     */
+    public function setDefaultColumnWidth($width);
+
+    /**
+     * @param float|null $height
+     */
+    public function setDefaultRowHeight($height);
+
+    /**
+     * @param float $width
+     * @param array $columns One or more columns with this width
+     */
+    public function setColumnWidth(float $width, ...$columns);
+
+    /**
+     * @param float $width The width to set
+     * @param int $start First column index of the range
+     * @param int $end Last column index of the range
+     */
+    public function setColumnWidthForRange(float $width, int $start, int $end);
+
     /**
      * Adds a row to the worksheet.
      *
diff --git a/src/Spout/Writer/XLSX/Manager/WorksheetManager.php b/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
index abfc476..3c7208d 100644
--- a/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
+++ b/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
@@ -14,6 +14,7 @@ use Box\Spout\Writer\Common\Creator\InternalEntityFactory;
 use Box\Spout\Writer\Common\Entity\Options;
 use Box\Spout\Writer\Common\Entity\Worksheet;
 use Box\Spout\Writer\Common\Helper\CellHelper;
+use Box\Spout\Writer\Common\Manager\ManagesCellSize;
 use Box\Spout\Writer\Common\Manager\RowManager;
 use Box\Spout\Writer\Common\Manager\Style\StyleMerger;
 use Box\Spout\Writer\Common\Manager\WorksheetManagerInterface;
@@ -25,6 +26,8 @@ use Box\Spout\Writer\XLSX\Manager\Style\StyleManager;
  */
 class WorksheetManager implements WorksheetManagerInterface
 {
+    use ManagesCellSize;
+
     /**
      * Maximum number of characters a cell can contain
      * @see https://support.office.com/en-us/article/Excel-specifications-and-limits-16c69c74-3d6a-4aaf-ba35-e6eb276e8eaa [Excel 2007]
@@ -62,18 +65,9 @@ EOD;
     /** @var InternalEntityFactory Factory to create entities */
     private $entityFactory;
 
-    /** @var float|null The default column width to use */
-    private $defaultColumnWidth;
-
-    /** @var float|null The default row height to use */
-    private $defaultRowHeight;
-
     /** @var bool Whether rows have been written */
     private $hasWrittenRows = false;
 
-    /** @var array Array of min-max-width arrays */
-    private $columnWidths;
-
     /**
      * WorksheetManager constructor.
      *
@@ -117,54 +111,6 @@ EOD;
         return $this->sharedStringsManager;
     }
 
-    /**
-     * @param float|null $width
-     */
-    public function setDefaultColumnWidth($width)
-    {
-        $this->defaultColumnWidth = $width;
-    }
-
-    /**
-     * @param float|null $height
-     */
-    public function setDefaultRowHeight($height)
-    {
-        $this->defaultRowHeight = $height;
-    }
-
-    /**
-     * @param float $width
-     * @param array $columns One or more columns with this width
-     */
-    public function setColumnWidth(float $width, ...$columns)
-    {
-        // Gather sequences
-        $sequence = [];
-        foreach ($columns as $i) {
-            $sequenceLength = count($sequence);
-            if ($sequenceLength > 0) {
-                $previousValue = $sequence[$sequenceLength - 1];
-                if ($i !== $previousValue + 1) {
-                    $this->setColumnWidthForRange($width, $sequence[0], $previousValue);
-                    $sequence = [];
-                }
-            }
-            $sequence[] = $i;
-        }
-        $this->setColumnWidthForRange($width, $sequence[0], $sequence[count($sequence) - 1]);
-    }
-
-    /**
-     * @param float $width The width to set
-     * @param int $start First column index of the range
-     * @param int $end Last column index of the range
-     */
-    public function setColumnWidthForRange(float $width, int $start, int $end)
-    {
-        $this->columnWidths[] = [$start, $end, $width];
-    }
-
     /**
      * {@inheritdoc}
      */
@@ -226,7 +172,8 @@ EOD;
         $rowIndex = $worksheet->getLastWrittenRowIndex() + 1;
         $numCells = $row->getNumCells();
 
-        $rowXML = '<row r="' . $rowIndex . '" spans="1:' . $numCells . '">';
+        $hasCustomHeight = $this->defaultRowHeight > 0 ? '1' : '0';
+        $rowXML = "<row r=\"{$rowIndex}\" spans=\"1:{$numCells}\" customHeight=\"{$hasCustomHeight}\">";
 
         foreach ($row->getCells() as $cell) {
             $rowXML .= $this->applyStyleAndGetCellXML($cell, $rowStyle, $rowIndex, $cellIndex);
diff --git a/tests/Spout/Writer/XLSX/SheetTest.php b/tests/Spout/Writer/XLSX/SheetTest.php
index 7fa5f77..91c28f9 100644
--- a/tests/Spout/Writer/XLSX/SheetTest.php
+++ b/tests/Spout/Writer/XLSX/SheetTest.php
@@ -117,7 +117,7 @@ class SheetTest extends TestCase
         $writer = WriterEntityFactory::createXLSXWriter();
         $writer->openToFile($resourcePath);
         $writer->setDefaultColumnWidth(10.0);
-        $writer->setDefaultRowHeight(10.0);
+        $writer->setDefaultRowHeight(20.0);
         $writer->addRow($this->createRowFromValues(['xlsx--11', 'xlsx--12']));
         $writer->close();
 
@@ -126,7 +126,8 @@ class SheetTest extends TestCase
 
         $this->assertContains('<sheetFormatPr', $xmlContents, 'No sheetFormatPr tag found in sheet');
         $this->assertContains(' defaultColWidth="10', $xmlContents, 'No default column width found in sheet');
-        $this->assertContains(' defaultRowHeight="10', $xmlContents, 'No default row height found in sheet');
+        $this->assertContains(' defaultRowHeight="20', $xmlContents, 'No default row height found in sheet');
+        $this->assertContains(' customHeight="1"', $xmlContents, 'No row height override flag found in row');
     }
 
     public function testWritesDefaultRequiredRowHeightIfOmitted()