How to scale down the model with features?

Hi,

I would like to scale down model in solidworks. I have attached the model here. In sketch 1, instead of having 10 mm * 10 mm square, i would like to have 0.3 mm * 0.3 mm square and instead of 20 mm (in Boss-Extrude 1), i want it to be 0.5 mm. How can i change the dimension such that all the features stay valid and final model would be exactly same as original one, only dimension would be different.

Thanks in advance.

Regards,

JP

SolidworksParts And Features