I am successfully using the python-twitter api python-twitter to update the status of a twitter account. But the font sizes are larger that than the other tweets. Firebug inspection shows that api update has a "TweetTextSize.TweetTextSize--26px" css class whereas the other tweets have a "TweetTextSize.TweetTextSize--16px" css class. My client will like to have the same font sizes. I am not sure if this can be changed
Ah, so this isn't something you can control from the API.
Twitter will sometimes increase the prominence of certain tweets based on whether its algorithms think the tweet is noteworthy.
For example, if a Tweet has a lot of retweets or likes, Twitter may temporarily increase the font size.
If you take a look at other accounts, you'll see that some of their Tweets will be bigger than others.
There's nothing you can do to control this, sorry.