True 3mm - Fits 7x21 Soccer Goals. Dimensions: 76"Hx216"Wx3Dx76"B - Mesh Size: 3.75"x3.75". Material: Twisted PE (PolyEthylene), Color: White. Weight: 9.1 lbs per net. Mesh opening of 14" (3.75"x3.75") comply with guidelines for child safety (opening should be less than 16 square inches).