These are top quality single panel shutters. Louvre blades are 89mm. These are tilted by moving one blade and the moves a group of louvres. These are in a frame that gives a bit of a flexible fit. There are 5 x framed shutters that are made to fit a window 891mm wide and 1826mm tall. One suitable for a bathroom window (but can be used anywhere) These are single panel shutters there is an about 20mm of framing so if the window is a little bigger than that measurement, the shutter will still fit and 1 x 4 panel shutter width 2725mm x 426 tall. These are very heavy, so pick up only please . Retail for these were about $8000. Were installed for approx 2 months.