property Ribbon.PopupFlatImageWidth as Long
Specifies the width of the column to display the icons/images when the control's PopupFlatAppearance is True.

TypeDescription
Long A Long expression that specifies the width of the column that displays icons/images/check or radio buttons, when the control's PopupFlatAppearance is True.
By default, the PopupFlatImageWidth property is 16 pixels wide. Use the PopupFlatImageWidth property to specify the width of the column that displays icons/images/check or radio buttons. The Image / HTMLImage property assigns an icon / picture to the item. The <img> tag can be used in the Caption property of the Item object to display an Icon or a custom-size picture.