I made this box for something else, it is a bit roomy for my washi tapes, but I already have 4 or 5 different sizes, width and height are also all different, so I think it's better if it's not a super snug fit as others might not fit.
For the box you need a piece of cardstock that is 9x10inches.
on the 9inch side you score at: 2 and 7 inches
on the 10inch side you score at: 2,4,6 and 8 inches.
Punch a thumb notch now as you can use it to see where you need to shorten the tabs easier, see pattern.
Cut away all the ||||| bits and glue with gluegun.