.25 (5.5×2.5), .33 (6×3), .50 (6.5×3.5), .75 (6.75×4.5), 1ct (7×5), 1.25ct (7.5×6), 1.5ct (8.5×6.5), 1.75ct (9×7), 2ct (9.5×7.5), 2.25ct (10×8), 2.5ct (11×9), 3ct (12×9.5), 4ct (14×10), 4.75ct (14×12), 5ct (16×12)