Resized embed objects return to original size in Word due to \s switch.
Cause:
When an object is embedded in a document, Word inserts an EMBED field that contains the \s switch. The \s switch returns an object to its original size whenever the field is updated.
Solution:
Select the object and press SHIFT+F9 to display the field codes. Remove the \s switch from the EMBED field.
1) Click on the embedded Excel object to select it.
2) Press SHIFT+F9. (The EMBED field appears.)
EXAMPLE: {EMBED Excel.Chart.5 \s}
3) Remove the \s from the field.
EXAMPLE: {EMBED Excel.Chart.5}
4) Press SHIFT+F9 again to return to the document view.