The size is moderate, it is ok if the design does not claim. Although the power of sticking is not powerful, it is enough to keep the open state. I intended to install it as described in the instructions, but the catch (state stuck with the magnet) became weak. The cause was the height position of the door side part. Regarding the height position, a guide that determines the position is attached and it is easy to position it, but I think that there is a tendency to go low. I got to stick well if I raised it about 1 mm. You had better try the best position before opening the pilot hole. Redoing is a bit tough.