With a density of 22.6 grams per cubic centimeter, it is the densest naturally occurring element.

And yet, it will still meet the weight limit.

This results in 27,899.7 grams, or 61.5 poundsthere’s still over 8 pounds to spare.

usps box at doorstep

Photo: georgesheldon/Depositphotos

The entire package weighs 48.5 lbs.

It’s right at the brink of human strength.

Any bigger, most people wouldnt be able to move it, theywrite.

usps box

Photo: Walter_Cicchetti/Depositphotos

There is, however, one thing in theory that could be that small and heavya neutron star.

It is, of course, all in the realm of theory.

It is impossible to exceed the the 70-pound domestic weight limit of the USPS small flat-rate box.