As wide as the narrow punctuation in a font, i.e. the advance width of the period or comma. HTML/XML named entity:   com.typemytype.robofont.layerData reference anchors components baseGlyph period transformation 1 0 0 1 0 0 contours lib name punctuationspace unicodes width 784 com.typemytype.robofont.mark 0.93 0.9 0.98 1.0 interface.gridadjust.original {'width': 770.0, 'leftMargin': 0, 'rightMargin': 0}