css shrink image

1squareImage {
2  border: 1px solid #ddd;	/* thickness and color of border */
3  border-radius: 4px;		/* edge rounding of border */
4  width: 150px;				/* width of image (px or % or auto) */
5  height: auto;				/* height of image (px or % or auto) */
6}

1<div style="width: 200px; height: 200px;">
2<img src="imagen\imagen1.jpg" style="width: 100px; height: 100px;"/>
3</div>