Okay, hopefully I can simplify my odd situation. :)
Among the items I sell are:
- Medium prints (8.5" x 11")
- Large prints (18" x 24")
The two applicable box sizes I use are:
- Flat box (11.75" x 10.5" x 2.5")
- Tube (25" x 3" x 3")
Ideally, if someone ordered just a medium print, I'd like it to ship unrolled in the flat box. If someone ordered just a large print, that would ship rolled in the tube. If someone ordered both a medium and large print combined, I would roll them together and ship them in the tube size.
I thought I'd worked out a good way to do this, by marking my medium prints as 11.5" x 1" x 1" and my large prints as 25" x 1" x 1". In theory, a single medium print would go to the flat box, but if there was a large print in the order, both would fit in the tube.
The problem is, a single medium print is defaulting to the tube, and I can't figure out why! I want to attach a higher package fee to the tubes, as a tube costs significantly more than a box - but I don't want someone who's just buying a single medium print to be charged for a tube.
Does anyone know how the CS is determining which size of box is "smallest"? I fiddled with the box sizes, and it doesn't seem to be going by either USPS's measurements (length + girth) or by volume (length x width x height), so I'm totally baffled! It DOES go to the correct box if I simply remove the tube from my list of packages, but then I would have nothing to ship my large prints in.
I know this is a bit of a wonky problem to explain, and I'm not sure if anyone has an answer. I figured it wouldn't hurt to ask, though!