if you want huge number , this be the biggest there be . the 2 1\/2 '' number be easy to read from across the room , but that do not mean you 'll be able to read it with you glass off . the display dimmer do dim it down to a acceptable level for sleep . the alarm be loud enough if you be not a super sound sleeper . the button be easy enough to use . the overall feel of the clock be cheap and plasticy . the tilt back be loose and feel really flimsy . the AM\/PM light on mine flick until I give it a smack . the description do not list the dimension , but it be big : 8 1\/2 '' W x 5 1\/2 '' h x 3 1\/2 '' d I be not delighted with it and may try a different clock .