Purpose: Accurate contouring in head and neck cancer (HNC) is critical. International consensus guidelines recommend the 5 + 5 mm rule for expansions around the primary tumor. wherein high- and low-dose clinical target volumes (CTV-P1 and CTV-P2. respectively) are created using successive 5 mm expansions on the gross tumor volume. https://www.ngetikin.com/super-value-1-2-in-Tobacco-Road-Acacia-Distressed-Engineered-Hardwood-Flooring-4-8-in-Wide-Sample-quick-super/