The only size criteria for the stone is width to be 12mm+/- 0.3mm, girdle thickness to be 0.5mm +/- 0.3mm. The L/W is also calculated, but if your width is right and you cut to the diagram, that’s automatic. Total height will not be a factor for judging, but that too is automatic if you cut to the diagram and get the width right. Study the sample judging sheet.