You can now specify the column width and row height in the new editor.

Editions included:
Standard, Premier, Education, Team and Partner Editions

Languages included:
All languages supported by Google Docs

How to access what's new:
In the new Google Spreadsheets editor, select the column or row you want to adjust. Right-click and select ‘Resize row’ or ‘Resize column’. Enter the value in pixels to get the size that you want and click ‘OK’.

For more information:
http://docs.google.com/support/bin/topic.py?hl=en&topic=15115
How to enable the new editor

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