When you insert a table in Word, the cells are not square. In other words, the height and width of a cell is not the same. If you want table cells to be square, you can easy change their height and width, as described in the steps below.

  1. Create a new table in your Word document.
  2. Select the entire table.
  3. Display the Home tab of the ribbon, click the small icon at the lower-right corner of the Paragraph group, and set Before and After to zero. This ensures sure that table paragraphs do not contain spaces before or after.
  4. Display the Layout tab of the ribbon.
  5. In the Cell Size group, specify identical sizes in the Height and Width boxes.
  6. Click the small icon at the lower-right of the Cell Size group.
  7. Click the Options button.
  8. Make sure all four cell margins are set to the same value.
  9. Clear the Automatically Resize to Fit Contents check box.

Word will automatically resize the table cells to match the values you specified in the steps above.