Why Do Two Bag Factories Give Different Prices for the Same Design?

You send the same tote bag drawing to two factories. One quotes USD 3.20. Another quotes USD 5.80. At first, it feels like one of them must be wrong. Maybe the higher factory is overcharging. Maybe the lower factory is trying to win the order. But in real custom bag manufacturing, two factories can look at the same design and silently make very different assumptions about fabric weight, lining, zipper grade, logo process, sewing reinforcement, packaging, inspection, sample revisions, and export preparation.
How to Balance Quality, MOQ, and Cost in Custom Bags: A Practical Guide

Custom bag manufacturing often looks simple from the outside: send a product photo, ask for a quote, compare suppliers, and choose the lowest price. But experienced buyers know the real challenge is not finding a factory that can “make a bag.” The real challenge is finding the right balance between product quality, MOQ, unit cost, sampling risk, material availability, production stability, and long-term reorder potential.