A box that looks right on the shelf can be too shallow once you wrap the contents. If you’re preparing a parcel for Polonez, measure the items with their protective wrapping in place before comparing box sizes. This gives you a starting point for choosing a carton that holds everything securely without relying on large amounts of filler.
What Should You Measure Before Choosing a Box?
Lay out the contents in the position they will occupy during shipping. Use a tape measure to check the dimensions that determine how the contents will fit:
- length — measure the longest side of the wrapped item or group of items, including any corners that stick out;
- width — measure across the widest point and include the space taken up by dividers if you are packing several objects;
- height — measure from the bottom of the bundle to its highest point, including any padding that sits above or below it;
- interior dimensions — measure between the inside walls of the carton and check the usable depth with the bottom flaps folded;
- exterior dimensions — measure the sealed parcel at its widest points when checking the carrier’s size limits for your chosen service.
Use the interior measurements to judge the fit and the exterior measurements when entering parcel details. If two cartons appear similar, test them with the wrapped contents before deciding which one to use.
How Much Space Should You Leave for Cushioning?
Check the carrier’s packing guidance for the type of item you are sending. A stack of folded clothes may need little extra room, while a ceramic mug needs cushioning around its rim, base, and handle. If the mug touches the carton wall or the flaps press down on its wrapping, try a wider or deeper box.
For a parcel with several items, wrap fragile pieces individually and arrange them so they cannot knock against each other. Try placing a narrow item beside a broader one if both can sit securely with padding between them. Choose a carton for that arrangement and fill the small gaps that remain.
How Can You Tell Whether the Packed Box Fits?
Fold the top flaps into place before applying tape. They should meet without pressure, and the carton should retain its shape along the sides and corners. If the walls bow outward, check which item is pressing against them and move to a box with more room in that dimension.
With the flaps held shut, tilt the carton gently. A slide or thud tells you there is room for the contents to move. If the empty space is mainly above the contents, try a shallower box that still leaves room for a top layer of cushioning.
Once the fit is right, seal the seams and record the parcel’s final measurements. For a parcel you plan to send with Polonez, use those numbers to check the service requirements for your destination, since the size of the box on the shelf may differ from the dimensions of the finished parcel.
