As in MS Excel then in an existing table in Ms Word is also almost the same use, you bia set the width, height, and how many cells you need.
How to Create a Table in MS Word.
1. The first open your MS Word.
2. enter the Tab Insert > Table
3. will appear boxes much you The High pulled out to determine how many columns you need.
4. well now you have your own table and you can change at will