Trick. With the capture 3/5 you can see the value 75. In fact the cursor go to 10. 75 was enter manually. And I could enter more (so the thickness could be more important) ...
The trick mean that there is lot of place in vue interfaces where you can enter more. For instance for an illumation baking of a mesh the slider go to 100%. In fact I made some at 200 and 300% sometimes...
Have fun.