Setting image target size

Hei,

Our app uses dynamic marke, so the user scans a marker and the app creates a new UserDefinedTarget.

Problem is that object appears about 5 times smaller than they should. At the moment, we scale all object by a defined factor to get an appropriate size but I would guess Vuforia is wrongly assuming the size of the marker thinking it is way bigger than it actually is.

Could there be a way to set the marker to be recognized as A4 for instance?

Thanks