Single fold bias is for projects that will not be seeing a lot of use, such as a wallhanging. It takes less fabric to make, and is easier to handle under the needle since itâÂÂs only one layer of fabric.

Double fold bias binding is for items that will be washed or worn often. ItâÂÂs stronger because itâÂÂs a double layer of fabric. For a baby blanket probably the double fold would be your best bet.