How big is 1.5 centimeters? Is it as big as a plain M&M?

Doctor's office called to say a 1.5 centimeter "mass" showed up on my mammogram and now I need an ultrasound. To be honest, I've had mammos every year and they always flatten my breasts out like a pancake, but this time, the technician didn't do that. I wondered about it at the time, but... show more Doctor's office called to say a 1.5 centimeter "mass" showed up on my mammogram and now I need an ultrasound. To be honest, I've had mammos every year and they always flatten my breasts out like a pancake, but this time, the technician didn't do that. I wondered about it at the time, but figured new technology probably made the machines more sensitive. I'm a little worried, of course, but I really want to know how big 1.5 cm is before I let myself get really worried. Thanks!
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