extjs 6 checkbox sizing - remove spacing in between

I am trying to make the checkbox's closer together... without so much space in between vertically.

I'm using a cls to make the font size smaller which is working properly. Any ideas?

.my-class .x-form-cb-label 
{
font-size: xx-small;
font-weight: bold;    
}

here is a pic of the spacing that is too large