so is by softly holding the base of the tail (the part closest to their body) and lifting up the mouse just enough to slide your hand under his or her body. keep gently holding the tail even when the mouse is in your palm to prevent it from jumping out of your hand. mice typically will not jump on to anything if the fall is more than a foot or so, but frightened animals are unpredictable and may jump from heights sufficient to hurt themselves.
you should not squeeze the body of a mouse from the sides or try to scoop it up from their enclosure as you could easily 