What is a cake slice box?

A wedge shaped box that holds a single slice of cake upright so the layers and frosting stay intact. It lets a bakery sell single servings as a grab and go item while keeping the presentation clean and branded.

How does a cake slice box protect the slice?

The wedge shape and a fitted base grip the slice so it does not tip or slide, keeping the decorated face and the layers clean. A window can show the slice while it stays protected.

Can I show the cake through the box?

Yes. A clear window lets customers see the layers and frosting, which sells the slice, while the box keeps it protected and branded. Choose kraft for artisan or white for a clean look.

Cake Slice Boxes

Name: Cake Slice Boxes, Single Serve, Window and Grease-Resistant
Brand: The Best Price Boxes
SKU: 259d80c99322

Cake Slice Boxes are the ideal packaging for serving individual slices of cake, ensuring each portion is protected and presented beautifully. Whether you’re running a bakery, café, or catering service, these boxes offer both functionality and style for your cake slices. Made from durable, food-safe materials, Cake Slice Boxes maintain the freshness and appearance of your cake slices, making them perfect for takeout, delivery, or special events. Order your Cake Slice Boxes from The Best Price Boxes today! No minimum order.

Pricing depends on size, material, and quantity, request a free quote

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MATERIALS

PREMIUM FINISHES

Shipping and Turnaround

Standard production runs 7 to 14 business days, depending on the box style, print method, and finishing you choose, a simple kraft mailer moves faster than a box with foil stamping or spot UV. Need it sooner? We handle rush requests case by case, so email us your deadline before you place the order and we’ll tell you straight whether we can hit it.

Shipping is free, anywhere in the world. We ship with FedEx, UPS, USPS, and DHL depending on your location and order size, and you’ll get a tracking number as soon as your order leaves our facility.

Standard turnaround: 7 to 14 business days
Rush orders: handled case by case, contact us with your deadline
Shipping: free worldwide via FedEx, UPS, USPS, or DHL
Tracking: provided once your order ships

A cake slice box lets a bakery sell single servings the way customers increasingly want to buy them, one slice at a time, without sacrificing presentation. The wedge shaped box holds a slice upright so the layers and frosting stay intact, and prints your bakery brand for a grab and go item that still looks made with care.

The shape does the work. A cake slice box is cut to hold a wedge with the pointed end secured and the tall side supported, so the slice does not tip or slide and the decorated face stays clean. Add a window to show the layers, a fitted base to grip the slice, and food grade board for safe contact. Print your brand across the panels in kraft or white.

We make custom cake slice boxes to your slice size with no minimum order, so a bakery or cafe can sell single servings without a huge run. Tell us the slice dimensions and we will size the box and quote it.

Cake slice box FAQ

What is a cake slice box?
A wedge shaped box that holds a single slice of cake upright so the layers and frosting stay intact. It lets a bakery sell single servings as a grab and go item while keeping the presentation clean and branded.
How does a cake slice box protect the slice?
The wedge shape and a fitted base grip the slice so it does not tip or slide, keeping the decorated face and the layers clean. A window can show the slice while it stays protected.
Can I show the cake through the box?
Yes. A clear window lets customers see the layers and frosting, which sells the slice, while the box keeps it protected and branded. Choose kraft for artisan or white for a clean look.
Is there a minimum order for cake slice boxes?
No. We make custom cake slice boxes with no minimum order, so a bakery or cafe can sell single servings without a huge run.

Related bakery packaging: Cake slice boxes work alongside pastry boxes, cheesecake boxes, choux boxes, and grab and go to go boxes. All printed with no minimum order. Related bakery packaging: tall cake boxes, choux boxes, and truffle boxes.

More Custom Bakery Boxes

See the full Custom Bakery Boxes range, or explore related options with no minimum order and our best-price guarantee:

Why Choose Custom Cake Slice Boxes for Your Business?

A cake slice box is sized by the cake it came from. A slice of a round cake is a wedge whose longest edge is the cake radius, so a slice from a 10 inch cake is 5 inches long whether you cut eight slices or sixteen. The slice count only changes the width at the wide end. Add about half an inch of clearance on each dimension, then set the height from your tallest slice plus half an inch to an inch so the decoration never touches the lid. Free design, free dielines and free samples, with no minimum order.

What Makes Cake Slice Boxes a Must-Have for Bakeries?

A slice box is sized by the cake it came from

This is the part nobody publishes, and it is the only thing that actually decides the size. A slice of a round cake is a wedge. Its longest edge is the radius of the whole cake, so the internal length of the box is set by the cake diameter and nothing else. A slice from a 10 inch cake is 5 inches long whether you cut the cake into eight or into sixteen. How many slices you cut only changes the width at the wide end. Cut more slices and the wedge gets narrower, not shorter. So two numbers give you the box: the cake diameter sets the length, the slice count sets the width.

Diagram showing a slice of a round cake as a wedge whose longest edge is the cake radius, and the box that fits it — The cake diameter sets the box length. The slice count only sets the width.

The numbers

Slice length is the cake radius. Slice width is the straight line across the wide end, which is what a straight sided box has to clear. Both are calculated from the geometry rather than taken off a supplier chart.

Cake	Slices	Slice length	Width at wide end	Internal box, length by width
8 in	8	4.0 in	3.1 in	4.5 by 3.6 in
8 in	12	4.0 in	2.1 in	4.5 by 2.6 in
9 in	8	4.5 in	3.4 in	5.0 by 3.9 in
9 in	12	4.5 in	2.3 in	5.0 by 2.8 in
10 in	8	5.0 in	3.8 in	5.5 by 4.3 in
10 in	12	5.0 in	2.6 in	5.5 by 3.1 in
12 in	8	6.0 in	4.6 in	6.5 by 5.1 in
12 in	12	6.0 in	3.1 in	6.5 by 3.6 in

The internal box column adds half an inch on each dimension. That is clearance so the slice goes in without being pushed, and comes out without being wrecked. Tighter than that and your staff will damage the product getting it in the box, which is a cost nobody counts. Round the result up to something you will reorder rather than chasing a decimal. A 10 inch cake cut into twelve wants roughly 5.5 by 3 inches, and that is a sensible size to standardise on.

Height is the one people get wrong

Length and width are geometry. Height is whatever your cake actually is, and it is where slice boxes fail. Measure the tallest slice you sell, at the tallest point, and add half an inch to an inch. A slice that touches the lid arrives with its decoration printed onto the underside of the box. If you sell a mix of a two layer and a four layer cake, size for the tall one. A short slice in a tall box looks a little empty. A tall slice in a short box is ruined.

What the wider cake box rule does not tell you

The standard guidance for whole cakes is to make the box 2 inches larger than the cake in length and width, and to add 1 to 2 inches of height for decoration. That rule is sound and it is widely published. It does not transfer to slices. Two inches of clearance on a wedge that is three inches wide is not a snug box, it is a slice sliding around in a container. Slices want a fraction of the clearance a whole cake wants, because they are smaller, lighter and travel alone rather than being lifted by the board underneath.

Board and window

A single slice is light, so board strength is not the constraint. Rigidity is. A slice box wants enough caliper to hold its shape when it is picked up by one corner, which is how customers actually carry them. A window is the most common addition and it changes two things. It removes material from the panel, so the board around it has to work harder, and it needs a film choice that does not fog when a chilled slice meets a warm room. Tell us if the slice goes out cold and we will spec accordingly. Grease resistance matters more on a slice than on a whole cake, because the cut faces are exposed and pressed against the board. That is a coating decision, not a board weight decision.

What to send us

The cake diameter and how many slices you cut. Those two numbers give us the footprint straight away.

The height of your tallest slice. Measured, not estimated.

Whether it travels chilled. This decides the window film and the coating.

Window or solid, and your artwork if you have it. Design and dielines are free, samples are free before a run, and the unit price falls as the run gets larger because setup is a fixed cost. Sizing a whole cake box too? Our packaging glossary covers the terms used here, and the corrugated specification reference covers board grades if you are shipping rather than handing over the counter.