as element:

<layout:block
       [xs="{size}"]
       [sm="{size}"]
       [md="{size}"]
       [lg="{size}"]
       [xl="{size}"]
       [xs-offset="{size}"]
       [sm-offset="{size}"]
       [md-offset="{size}"]
       [lg-offset="{size}"]
       [xl-offset="{size}"]
       [dynamic="{string}"]>
</layout:block>

as attribute

<ANY layout-block
     [xs="{size}"]
     [sm="{size}"]
     [md="{size}"]
     [lg="{size}"]
     [xl="{size}"]
     [xs-offset="{size}"]
     [sm-offset="{size}"]
     [md-offset="{size}"]
     [lg-offset="{size}"]
     [xl-offset="{size}"]
     [dynamic="{string}"]>
   ...
</ANY>

Parameters

Param	Type	Details
xs (optional)	size	The grid ratio to use for the smallest break point
sm (optional)	size	The grid ratio to use for the small break point
md (optional)	size	The grid ratio to use for the medium break point
lg (optional)	size	The grid ratio to use for the large break point
xl (optional)	size	The grid ratio to use for above the large break point
xs-offset (optional)	size	The offset ratio to use for the smallest break point
sm-offset (optional)	size	The offset ratio to use for the small break point
md-offset (optional)	size	The offset ratio to use for the medium break point
lg-offset (optional)	size	The offset ratio to use for the large break point
xl-offset (optional)	size	The offset ratio to use for above the large break point
dynamic (optional)	string	Watch for updates to the attributes