This is an old standby I use a lot for gift cards, treat boxes and
even small gifts…in fact I made the one pictured below to gift the
necklace I made HERE.
Just print the pdf file onto the paper you wish to craft the box
from (on the BACK side of course). The printed pattern tells you
exactly what to do to assemble the box. It mentions “scoring” along
some of the curved lines…here’s a hint –> use an embossing
stylus and place your paper on top of a magazine to score. Works