How do you control the size of a feature in parametric modeling in Solidworks?

In SolidWorks, you can control the size of a feature in parametric modeling by defining dimensions during the sketching phase or by editing feature parameters in the feature tree. You can use the "Smart Dimention" tool to set specific dimensions in the sketch, or modify existing features by right-clicking on them in the feature tree and selecting "Edit Feature." Additionally, you can create global variables or equations to maintain relationships between dimensions, allowing for easy adjustments across multiple features.