Easy and Simple Steps: 1: Place half of the lid over one edge of the container. Start on the side closest to your body. 2: Stretch the other half of the lid away from you, inching your way around the bowl. 3: Stretch, and then press the top of the lid while pulling the tabs to create a vacuum seal. 4: Pull the sides to ensure a perfect fit. Sizes: 2.6 in diameter (will stretch to 3.5 in) 3.5 in diameter (will stretch to 5 in) 4.3 in diameter (will stretch to 6 in) 5.5 in diameter (will stretch to 8 in) 6.3 in diameter (will stretch to 9 in) 7.9 in diameter (will stretch to 11 in) Insights: Silicone Material- Eliminating the need to repeatedly buy expensive plastic wrap. Flexible Silicone-Silicone lids are round yet stretchy enough to fit snugly over odd-shaped mugs, pots, cups & bowls. Features-non-toxic, dishwasher-safe & leak proof, air-tight seal so foods stay fresh. Microwave-safe & heat-resistant to 450 f so you can quickly reheat & enjoy delicious leftovers