Flat poly bags are the most affordable and most common way to package products. These standard, flat plastic bags are a simple, easy way to protect any items that are important to you. Bags are open-ended for easy loading and can be sealed with a standard hand sealer. Flat poly bags are ideal for packaging favors and your candy favorites. Standard sizes available: cm. 10×36 – cm. 12×45 – cm. 15×50 – cm. 20×60. Weight per pack: Kg. 10.