Pretty much anything from Amazon comes in a box about 3 sizes too big!
My daughter’s pump supplies come in a box that’s far too big, with FRAGILE stamped all over the side but minimal padding inside so it all falls about. To be fair it’s only plastic stuff so not really fragile, but why stamp the box as such then. Whereas Dexcom, by comparison, come in a box just big enough to pack it all in neatly so that it doesn’t move. So it can be done!
A lot depends on who packs it. I don’t know whether such things are fully automated yet. When I first started working after university, there was a lad in the warehouse who was not the most intelligent, however his spatial awareness beat everyone else’s hands down. He’d gather all the parts for a customer’s order and choose a box half the size of that which any of the other packers would. They’d all be standing there thinking “he’ll never get all that stuff in that little box” but he did, every single time!