Button size doesn't change inside buttons class

[SylvanoTombo]

Hi, i don't know there another way to change the button size inside button groups but when i put size class in button inside groups, it doesn't work.. how my code look like:

 <div class="ui buttons">
        <button class="ui labeled icon button small">update</button>
        <button class="ui red labeled icon button">delete</button>
  </div>

[SylvanoTombo]

Just putting the size class on groups do the thing

 <div class="ui buttons small">
        <button class="ui labeled icon button">update</button>
        <button class="ui red labeled icon button">delete</button>
  </div>