is it this one?
formatting link
IF SO... you HAVE the sizes on that template that fit those envies... look carefully...see the rectangles in there? they aren't envies... take a piece of paper (I'm sure you have some... :D) fold it in HALF... now put that fold against one of the lines of the rectangle (depends which side you want the fold on) now cut only 3 of those edges... TADA!!!! the card that fits the envie on the template... they provided all the sizes...
My biggest complaint? Coluzzle's instructions on the packages are non existent...