Last week I branched out into custom box sizes, using the formulas in my book to figure out how to make a box big enough to hold post-it notes. Did it work? Yes! Did I use the same formula/notes to make the red box and then the green box, but they ended up having slightly different overhang dimensions? Also yes!
But practice makes perfect, and I’m still practicing.
Fair warning now: If I know you, there’s a non-zero chance that your gift this year is going to come in a homemade box. (The green box is actually going to hold carwash tokens for my friend’s traditional Christmas gift; I used paper from his store for it.)