I don't see how that many RIR eggs can fit into a small box. The most I am able to ship is 32 in a 12x12x8 priority box. I have done this 6 or 7 times with no breakage. I put bubble wrap in bottom, a layer of 16 eggs each in bubble wrap bags, fill in outside space (usually only an inch between box and edge of eggs) with shredded paper, another layer of bubble wrap, another layer of 16 eggs and then fill in with shredded paper and I am at top. My eggs are large to extra large. When I am done the box weights between 5.5 to 6 lbs.