You can use the spacing classes from the OutSystemsUI Theme
Check the spacing classes in this link that OutSystemsUI provides.
https://outsystemsui.outsystems.com/StyleGuidePreview/Spacing
Then you just need to put the class on the style classes of the element

If you want to give a bottom space, you need to use margin-bottom as I did here, where I am giving a space of 24px to the bottom of the element that I am giving the class.

For the heights, you can use the height property on the styles, which I don't recommend, or use padding as you do for spacings or you can create custom classes to give min heights or heights, but remember if you give a heigh it will be a static measure, you can always do min-height. You can check at the same link(above) the padding classes to apply.
https://www.w3schools.com/csS/css_padding.asp
Regards,
Márcio