To help you calculate your correct trim size we've built three calculators: Standard Swing Door, Double Action Door, and Cavity Slider. If you have any questions we're here to help, feel free to contact us at or call 03 313 4754.

Please ensure figures entered are correct and accurate. Hallmark Group accepts no liability for any costs, direct or indirect, from the incorrect use of this calculator.  If you have any questions please contact us and we would be happy to discuss.

Please ensure figures entered are correct and accurate. Hallmark Group accepts no liability for any costs, direct or indirect, from the incorrect use of this calculator.  If you have any questions please contact us and we would be happy to discuss.

Please ensure figures entered are correct and accurate. Hallmark Group accepts no liability for any costs, direct or indirect, from the incorrect use of this calculator.  If you have any questions please contact us and we would be happy to discuss.