You can adjust the X and Y size by editing in the slicer, the Z axis should remain unchanged due to the height of the letters so that they are on 3 layers at 0.20 height.
Support needed for protruding letters.
Z dimension is 4.6mm (4mm heart, 0.6mm letters)
Designed for printing at 0.2mm height
The author marked this model as their own original creation.