Apps AppCompat Tab Bar, tabs headers large and can't shrink them!

[MarKco]

Hello to everybody,
I'm developing an app which makes use of appcompat. I'm adding some tabs to it by simply using
[HIGH]ActionBar.Tab tab = getSupportActionBar().newTab();[/HIGH]
I expected the tabs to be as large as the text I put in them, but it's not. They are equals in width, which is beautiful but makes them overflow when I have three or more tabs.

I tried to style them by using

    <style name="AppBaseTheme" parent="Theme.AppCompat.Light">
        <item name="actionBarTabTextStyle">@style/TabTextStyle</item>
    </style>

and them

    <style name="TabTextStyle" parent="@style/Widget.AppCompat.ActionBar.TabText">
        <item name="android:width">10dp</item>
        <item name="android:padding">0dip</item>
        <item name="android:textSize">5px</item>
    </style>

it doesn't change anything, it's just like I didn't write these lines :-/ I put them in values-v11 and values-v14 as well, nothing happened.

I'm testing with a Galaxy Nexus having Android 4.3 on it and on a Galaxy S with 4.3 as well.

Does anybody know what could be wrong here?

Thank you in advance