Use of 11pt font size

I am about to use CSS to set up an Arial font size 11pt on parts of my site.
The authoring software I am using does not offer this size in its menu, only either 10pt or 12pt.
Can somebody please confirm to me that there are no problems with using the 11pt font size. Acceptability across broswers etc.

There won't be problems but sizes may vary across browsers as pt doesn't rend the same. Using px will render the same but IE users won't be able to resize their text.