Rectangular cake boxes
There are 19 products.
Rectangular cake boxes are what you need for traybakes, rectangular birthday cakes, slices, tiramisu or number and letter cakes. Here you will find cake boxes with a base from 21 x 11 cm to 45 x 35 cm, in a fixed or adjustable height, individually or in a value pack, in white or kraft, with a window or as a set with a matching cake board. Whether you bake for the family, supply a company party or pack cakes every day in a bakery, the right box makes sure every rectangular cake arrives safely and looking its best.
Sizes and styles at a glance
Common formats include the rectangular cake box measuring 40.6 x 30.4 x 15.2 cm and the 45.2 x 35.2 x 15.2 cm box. The range at a glance:
- White rectangular cake boxes in 33 x 22.5, 35.5 x 25, 38 x 27.5 and 43 x 33 cm, each 15 cm high
- Cake boxes with adjustable height in 35 x 25, 40 x 30 and 45 x 35 cm
- White cake box 40 x 30 x 20 cm for taller traybakes
- Value pack of 25: white cake box 40 x 30 x 15 cm
- Cake boxes with cake board in rectangular 33 x 22 x 15 cm and 35 x 25 x 15 cm, plus the flat box and board set 28 x 42 x 6 cm
- Rectangular cake boxes, also in kraft, the Pure rectangular cake box and a white box with window 21 x 11 x 6 cm for slices and small loaf cakes
Ideas: what fits in a rectangular cake box?
Rectangular boxes are more versatile than you might think. A number cake for an 18th or 50th birthday needs a large, flat box such as 45 x 35 cm. A classic traybake for a club event, a carrot cake or a custard slice fits in 40 x 30 cm. Tiramisu and layered desserts in their dish fit in a box with adjustable height. Slices of loaf cake, traybake slices or a small lemon drizzle cake look especially pretty in the slim white box with window 21 x 11 x 6 cm. And for a rectangular wedding or corporate cake with a logo, choose the box with a matching cake board.
How to find the right size
Measure the length and width of your cake and add about 1.5 to 2.5 cm on each side, so 3 to 5 cm per dimension in total. A 36 x 26 cm traybake fits nicely in a 40 x 30 cm box. For the height, allow at least 2 to 3 cm above the cake including decoration. Models with adjustable height adapt flexibly to your cake, which is especially handy for creations of different heights.
- Cake 30 x 20 cm: box 35 x 25 cm (a tight fit: 33 x 22.5 cm)
- Cake 36 x 26 cm: box 40 x 30 or 40.6 x 30.4 cm
- Cake 40 x 30 cm: box 43 x 33 or 45 x 35 cm
Tips for transport
Place rectangular cakes on a sturdy, matching base so they do not sag when carried. You will find rectangular cake boards among our cake boards, and box and board sets among the cake boxes with cake board. Chill cream and mousse cakes thoroughly before transport and lay the box flat on the car floor or in the boot. On warm days, cool bags and ice packs help. Always carry large boxes from underneath with both hands.
What to look for when buying rectangular cake boxes
Besides the size, height, sturdiness and look all matter. For flat cakes a low box is enough, while decorated cakes need 15 or 20 cm of height. A box with adjustable height is ideal if you bake cakes of different heights. White looks clean and is easy to personalise with a label, while kraft looks natural. If you pack cakes regularly, the value pack of 25 saves money.
Frequently asked questions about rectangular cake boxes
Which box for a half traybake?
That depends on your tray. Measure the cake and choose a box that is 3 to 5 cm larger per dimension; 35 x 25 or 40 x 30 cm often fit.
What does adjustable height mean?
The box can be closed at different heights, so it adapts to both flat and taller cakes.
Are rectangular boxes available in large quantities?
Yes, the white cake box 40 x 30 x 15 cm comes in a value pack of 25.
Which box is best for a number cake?
For two digits, the large 43 x 33 or 45 x 35 cm formats work well; for a single digit, 40 x 30 cm is often enough.
You will also find square cake boxes, pastry and tart boxes up to 10 cm high and the full Cake & pastry boxes range. For number cake inspiration, see our number cake recipes.