Before you go on line to purchase take a note of the product code. Products
sold in pack sizes. Remember to measure your room first then divide by the area
the pack covers to find out the number of packs you need.
Example 7m x 4m = 28 m2 divide by 2.21= 12.67 packs therefore 13 packs
required. If your ordering the plus range divide by 1.72 (17 packs required on
the example area given).