ZooziiOval Side Drilled. There are three sizes in this tool...Mini, Small and Medium. The holes go side to side, creating some great texture in finished jelwery pieces! The measurements are as follows: Thickness for all are 7mm Mini: 17mm long by 13mm wide Small: 20mm long by 15mm wide Medium: 24mm long by 18mm wide This tool will accept up to a 3/32nd mandrel. Hint: This tool works well with a "chunky donut bead" as the "pre-press" shape. The donut should be about 1mm thinner on each side then the press is wide.