Is an eight-sided box twice as complicated as one with four sides? Not this one. As far as measuring goes, the OctaBox is easier to build than a rectangular box. On the OctaBox, every side is the same length and the top and bottom are identical—in fact, there are only two different parts to make for the whole project.
Making the two halves fit perfectly together isn’t complicated, either. I used a really clever system (see The Easy Way to Make a Lipped Box at bottom). It worked great, but my execution was flawed: I made the box upside down! Granted, the top and bottom look alike, so what’s the difference between them? Not asking that question while building the box is how I got into trouble.
I wanted the box to have a deep lid, so you could use it as a receptacle for discarded shells or candy wrappers. I also wanted the lid to be narrower than the base, so when assembled the box didn’t look top-heavy.