This year I ordered too many mini calendars from Vipies so I decided to make some 'tuck ins' to add to my Valentine's Day cards. Last year I made this style of collapsible stand-up calendar and it worked very well so I decided to use the same format this year. I start with a 3"x 8" strip of single or double sided card stock (Paper Crate) and score it to fold at 3", 6", 6-3/4", and 7-1/2".