Question

I need to set it with CSS, not jquery.

The selector is for

all labels which do not have a sibling that is a checkbox or radio component.

a sample is:

<span>
  <input id="item" type="checkbox">
  <label for="item">Data</label>
</span>

This is because i have CSS which sets label to 12px, BUT it affects asp:checkboxes and asp:radio…, but i do not want them to be affected.

Answer 1

There isn’t a CSS selector for an element that doesn’t have a sibling of a certain kind.

But if you can guarantee that your structure is always an input followed by a label, then you could use the next-sibling combinator with :not() like so to match the label:

input:not([type="checkbox"]):not([type="radio"]) + label

Otherwise you’re going to have to add classes to those labels, or use jQuery.