I looked online to buy some, but shipping to Hawaii is horrendous. I searched for some DIY designs and found these beauties! http://www.thisiscolossal.com/2011/06/redesigning-the-egg-carton/ and http://www.redesignrevolution.com/eco-friendly-egg-carton-by-otilia-erdelyi/. I want to make them and will try to figure out the dimensions, but I need something to use now!
I checked instructables and couldn't find anything that suited me so I thought about it and figured out what would work. The eggs would need to be separated from each other - shell to shell contact would encourage breakage and held so they wouldn't roll around. The eggs needed air circulation and I wanted a lightweight package. I came up with the following:
Each egg is individually nested in a Cardboard Capsule. I made concave nests out of coiled cardboard that could easily adjust to the different shapes and sizes of eggs that our chickens lay and fitted them into a cardboard collar. The shallower nest, which holds the fatter side of the egg was glued into the collar and serves as the "bottom" of the Capsule. The deeper nest, which holds the pointy side, is used as a removable cap that fits into the top of the collar. I attached a pull handle at the top of the "cap" when I discovered that I couldn't get my egg out after I put it in! Fortunately, I was practicing on a wooden egg so I could just shove everything out without fear of breaking the egg.
Anyway, here is the finished product. I added a basket, but you can easily toss the capsules into a bag or your purse without worry. The eggs don't move around when you shake the capsules!!
CAUTION WHEN OPENING THE CAPSULE: HOLD THE BASE DOWN WHILE YOU UNCAP OTHERWISE YOUR EGG MIGHT GO FLYING.