Simple tricks to fill every cubic inch and keep shipping costs low
Why It Matters
USPS Ground Advantage and Priority Flat Rate both price by size, not just weight. Pack smart and you’ll fit more flour in the same box—often shaving dollars off your total or letting you add an extra bag for free.
1. Small Cubic Box (10 × 8 × 5 in)
Perfect for first-time bakers or quick refills.
| Fits Snugly | Typical Uses |
|---|---|
| 2 × 4 lb sacks | Stock up on two staple flours. |
| 4 × 2 lb sacks | Variety pack of smaller bags. |
| 10 × “pouch” bags | Great for testers, gifts, or multiple specialty grains. |
| 1 × 4 lb + 2 × 2 lb | One big core flour plus two specialty add-ons. |
Tip: Once you reach three 4-lb sacks or an 8-lb bag, you’ll overflow—jump to the Medium Cubic.
2. Medium Cubic Box (12 × 9 × 7 in)
Our “Goldilocks” size—most popular for families and avid bakers.
| Fits Snugly | Ideal When… |
|---|---|
| 1 × 8 lb + 2 × 4 lb + 1 × 2 lb | You want the full 8-lb sack plus supporting players. |
| 2 × 10 lb | Serious sourdough bakers, this one’s for you. |
| 4 × 4 lb | Rotate through four different grains. |
| 7 × 2 lb | Gift bundles or lots of small-batch flours. |
| 2 × 8 lb | Double up on your favorite. |
| 1 × 4 lb + 5 × 2 lb | One staple, five specialty flours. |
| 2 × 4 lb + 1 × 8 lb | The “weekend bakery” mix. |
| 2 × 4 lb + 4 × 2 lb | Balance of midsize and sampler bags. |
| 1 × 8 lb + 4 × 2 lb | Big base flour plus four accents. |
Tip: If you hit eight × 2-lb pouches or more than ~24 lb total, jump to Large Flat Rate for a better deal.
3. USPS Medium Priority Flat Rate Box
Great backup when your order is too wide for cubic pricing but not heavy enough for the large box.
- 1 × 8 lb
- 2 × 4 lb + 1 × 2 lb
- 4 × 2 lb
Tip: If you’re close to filling this one, it’s usually cheaper to upgrade straight to the Large Flat Rate and throw in an extra bag.
4. USPS Large Priority Flat Rate Box
Maximum flour, one flat price anywhere in the U.S.
| Fits Snugly | Perfect For… |
|---|---|
| 2 × 8 lb | Heavy bakers who power through flour fast. |
| 1 × 8 lb + 1 × 4 lb + 1 × 2 lb | Balanced large order without over-stuffing. |
| 2 × 4 lb + 3 × 2 lb | Lots of recipe flexibility. |
Tip: Anything above about 26 lb almost always ships cheapest in this box.
Ready to Order?
Head back to the Shop, pick your flours, and use this guide to choose the box that maximizes every dollar of shipping.
Got questions or special requests? Email Judy at info@conservationgrains.com—she loves a good packing puzzle!
Happy baking, and thanks for choosing regional Montana flour!