How to change width of Submenu

Link to example: https://pasteimg.com/image/s0Cs

Fixed it myself

/* Widen the submenu. Default = 12.6875em = 203px. Changed to 18.75em = 300px
 https://www.w3schools.com/tags/ref_pxtoemconversion.asp */

.main-navigation ul ul a {
		white-space: normal;
		width: 18.75em;
	}