DIY How to make a 12"x7"x4" Cardboard box at home 12x7x4

[@Mackienze-R-Matuasilva]

Thank you so much, you saved me lots lots of money, I'm making my own boxes from free cardboard I get from supermarket

[@brinojos]

Exactly what I was looking for! :)

[@ronaldcheeseman7400]

How do find the start for the board size 26" x 20 " my final size of the box is 12"x7"x4 " can you please explain to me thanks Ronald