Cell Sizes
The smallest size, which is 3/8", typically looks like smaller pleats. The traditional width and style of pleated blinds Is a cell size that's ½".The next smallest one is a 9/16" cell size and comes in single layer shades. This is a good option for deep windows.
A 7/8" cell size comes in either a single or double layer and works well with windows that are deep as well as shallow. The 1" cell size is considered to be a large size and only comes in single layers. Use these for deep sills and windows.
The largest size, which is 2", is intended for large windows. Because of its large size, it's known for its superior energy insulation and sound control. It just comes in single layers, giving it a traditional. clean appearance.