Is it cheaper to use a flat-rate box or your own box?
Shipping carriers offer boxes with flat rates to ship, an option that tends to be cheaper and more predictable than shipping a custom box because the carrier doesn’t have to weigh or measure your parcel for a personalized rate. However, if you have products that don’t fit well into standard flat-rate boxes, your packaging may be better. It’s worth comparing each approach’s costs and benefits to determine which works best for your business.