This drove me crazy this morning so I had to post this. I thought it would be convient to skip the line and print postage online. Wrong. Even if you don't know the weight and are using a flat rate box you need to put in a weight to get through this screen. I was so sure I was on the wrong page for 10 min until i figured out it is just a dumb form. You must enter a made up weight if you don't know the weight. Stupid. I have done the post office a favor and fixed the form below. Go here to have fun with this form.