Cake boxes are sized by the cake, not by the box. The rule bakers use is simple: give yourself roughly an inch of clearance on every side, which means a box about two inches larger than the cake diameter, and enough height that the icing never touches the lid.
Round and layer cakes
| Cake diameter | Common box size (inches) |
|---|---|
| 6 inch | 8 x 8 x 5 |
| 8 inch | 10 x 10 x 5 |
| 10 inch | 12 x 12 x 6 |
| 12 inch | 14 x 14 x 6 |
Five inches of height clears a standard two layer cake with normal icing. If you decorate tall, tier, or add a topper, move up: eight inches or more of internal height is common for tiered work, and it is far cheaper to order the taller box than to redesign the cake.
Sheet cakes
| Sheet size | Common box size (inches) |
|---|---|
| Quarter sheet | 14 x 10 x 4 |
| Half sheet | 19 x 14 x 4 |
| Full sheet | 26 x 18 x 5 |
Sheet boxes are wide and shallow, so the base has to resist flexing when it is carried one-handed. If your sheet cakes travel in cars, ask for a heavier board on the base rather than a taller box. Corner strength matters here too, since a wide box picked up at one end puts all the load on two corners.
Windows
A window turns a plain box into a display case, and for anything decorated it usually pays for itself at the counter, because customers buy the cake they can see rather than the one described on a label. Keep the opening inset from every fold so the panel keeps its stiffness, and expect the die to change. Sizing rules for openings and film patches are on window box dimensions.
Going custom
Custom sizes make sense when your cakes do not match the standard ladder above, when you want a shape nobody else on your street has, or when you want the box printed. The die is cut to your dimensions and the printing plates are made for your artwork, and both are included rather than billed separately. Send the cake dimensions including the tallest decoration and our design support will produce the dieline. Direct food contact changes the board and coating specification, so state on the quote request whether the cake sits on a board or directly on the box base.
Ordering and lead time
The minimum is 100 boxes per size and artwork, which for most bakeries means picking two or three sizes rather than the full ladder. Bulk pricing starts from about $0.48 per unit, confirmed on your written quote. US shipping is included. Turnaround is quoted per product across three lanes: rush combines expedited production with air freight and adds roughly 7 to 25 percent, standard moves by air, and cost saver moves by sea. Production starts from about 7 business days plus 2 to 5 days for delivery, and specialty imported items can run up to about 12 weeks, so order seasonal stock well before the season.
Send your sizes to the quote form for a written per-unit price. Related pages: custom cake boxes and bakery box dimensions.
