Spacer for silicone joint

When i was putting the sink at the final place it was not 100% straight and it was wobbling. I had to put silicone to fix it and so that it was not wobbling anymore i created this spacer in different heights to put it under the sink and make it horizontal. The holes in the spacers was for the silicone to glue the spacer ,the sink and the cupboard underneath totally together.