Shipping zones decide what delivery costs and who can order from your store. Start simple: two zones, deliberate rates, and real-address testing before launch. You can refine later once you see actual order patterns.
A shipping zone is a group of countries, states, or provinces that share the same shipping rates. Every order's destination falls into exactly one zone, and the rates in that zone decide what the customer pays. Zones also control where you ship at all: a country in no zone cannot check out. Getting zones right matters because shipping cost is one of the top reasons shoppers abandon carts.
For a new US store, start with a domestic zone (the United States) and one international zone (everywhere else you are willing to ship). This keeps the setup manageable while you learn. Many new merchants create a dozen zones on day one and then cannot explain their own rates. Two zones force clarity: what does it cost to ship within the US, and what does it cost to ship abroad.
Flat rates are simple and predictable for shoppers: $5.95 domestic, $19.95 international, for example. They work well when your products are similar in size and weight. Calculated rates pull live prices from carriers and protect your margins on heavy or odd-sized items, but they add complexity and can surprise shoppers at checkout. Pick one approach per zone and be consistent. Mixing flat and calculated rates in the same zone confuses both you and the customer.
Before setting a flat rate, weigh and measure your typical packed order and check actual carrier prices for your common destinations. A flat rate set below your real cost is a subsidy you pay on every order; set above it, it is a conversion killer. Price a few representative orders, add packaging cost, and build in a small buffer for rate increases. Revisit the numbers quarterly, because carrier rates change every year.
The contiguous US, Alaska, Hawaii, and US territories have very different shipping costs, and lumping them together means either overcharging some shoppers or losing money on others. Consider separate rates for Alaska and Hawaii from the start. Also decide your policy on PO boxes and APO addresses: some carriers cannot deliver to them, so say so in your shipping policy rather than letting orders fail at checkout.
Add products to a test cart and enter real addresses: a New York apartment, a California house, an Alaska address, a London address. Confirm the right zone applies, the rate looks sane, and no destination you intend to serve is blocked. This ten-minute test catches the zone mistakes that otherwise surface as angry support emails in launch week.