elevate a specific cartonnage skill


how to calculate the greyboard dimensions of a

box with fitted lid


Calculating the greyboard dimensions of a box can sometimes feel like doing maths!

But once you know how it works to calculate the dimensions of a box, it's not that difficult.

In this tutorial I'm going to show you how you calculate the dimensions of a box with fitted lid by using formulas.

We start with the tray and from there we determine the dimensions of the top lid and bottom plate.

I hope with this tutorial you understand how to calculate the greyboard dimensions for your box,

so you can apply this method for different sizes of this box design.



The tutorial consists of a pdf (8 pages | English) with formulas how to calculate the greyboard for this type of box.

The dimensions are indicated in centimeters and inches.


Your investment

€ 25 | $ 26 | £ 22


With this tutorial you don't learn how to make the box.

 If you want to learn how to make this box, you can follow the online course box with fitted lid.


Prices are exclusive of VAT if applicable (EU) & shipping costs


Photo: Malin Palm Vestlund


I loved every part of the course from The Cartonnerie!

From when the supplies arrived, packed so beautifully and then to follow the instructions that were so easy to understand and the end result is just gorgeous.

I love my box and will definitely keep making them.

 Malin Palm Vestlund, Studio Brandis


I ordered three courses from The Cartonnerie: the folio, the portfolio with screws and the box with fitted lid. The journey in learning these new skills has been absolutely wonderful and highly recommend it. The video and picture pdf guide were a perfect bundle to guide a course taker through the entire project. They were clear, concise and easy to understand. The final products look beautiful! Being able to give a touch of elegance/luxury, and overall elevate my simple wedding stationery and pictures made a remarkable difference. I am looking forward to taking more courses with Sabrine and The Cartonnerie!

Shravani Kher, Marigold & Dahlia


Sabrine's course is fantastic! I was hesitant to invest the money into something I felt I could figure out on my own but I'm glad I made the purchase. Her instructions are detailed and the video is soothing to watch. I've made several of the hinged boxes and they turn out beautiful due to her course.

I hope to purchase additional courses in the future.

 Angela Godfrey