Yep, that's an "irreg"

Darby's birthday gift arrived today (a digital piano). The box was... larger than expected (back pack present for scale). It's what we UPS alum call an "irreg", meaning a package of irregular size. It was interesting to receive such a package, because I have a fairly detailed understanding of the process irregs endure, and the (non) word irreg was my first thought upon seeing the package, no doubt about it.