Fixed cell width

[PatrickK]

Hello,
How can I attribute an equal cell width to the columns in such a table?
Thanks in advance.

<table class="upper">
    <tr>
        <th> </th>
        <th>Very Long text</th>
        <th>Med. text</th>
        <th>Short</th>
    </tr>
    <tr>
        <th>Measured Parameter</th>
        <th>{{condition one}}</th>
        <th>{{condition two}}</th>
        <th>{{condition three}}</th>
    </tr>
</table>

[Added code tags ~kshegunov]
[Locked as remotely relevant to Qt, answer provided by @VRonin's google search ~kshegunov]

[VRonin]

https://www.google.com/search?q=html+table+equal+column+width
I'm inclined to lock due to 0% relevance to Qt but I'll let the other @Moderators decide

PS: QTextEdit supports the width attribute: http://doc.qt.io/qt-5/richtext-html-subset.html#table-cell-attributes, so regular HTML rules apply. ~kshegunov