There are a few ways to resize a shape in Photoshop. The easiest way is to use the resize tool on the left side of the screen. You can resize the shape by clicking and dragging it, or by pressing and holding down the control key and then dragging. The size of the shape will depend on how much space you give it. If you give the shape too much space, it will be too big to fit in your image. If you give the shape too little space, it will be too small to fit in your image.