REACT-ICONS reduce thickness
<PlusCircleOutlined style={{ fontSize: "50px", color: "#408021", strokeWidth: "30", // --> higher value === more thickness the filled area stroke: "white" }}/>
Source: stackoverflow.com
<PlusCircleOutlined style={{ fontSize: "50px", color: "#408021", strokeWidth: "30", // --> higher value === more thickness the filled area stroke: "white" }}/>