There are lots of templates out there in blogland for this and mine was inspired from this post I made here for us Europeans that have different sized c/s to our International partners. I must point out that I haven't bought this template from anyone or seen how it is made, I've purely looked at the one Lauren Meader made and came up with my own from one sheet of A4 cardstock.
So, firstly one template.
So in short there is no cutting of the A4 sheet of cardstock. Simply score at 2.2cm & 4.4cm on the two long sides and one short side. On the remaining short side score at 6.6cm and 8.8cm. The measurement are a bit odd but it's the best way of doing it to ensure the holder can take the envelopes as well as the cards, trust me it will be perfect. When you've scored your cardstock it will look like this.
You then need to cut out the grayed areas as shown on the template and make cuts on the red lines as also indicated. Your A4 sheet should then look like this. Before you start sticking the box together, fold and crease the bottom score line and using a 1 1/4" circle punch, punch out half a circle. Which will give you this... Score all the remaining score lines ready for sticking together. At this point I would glue the flap at the bottom where the half circle was punched out. I've used Tombow Adhesive to stick the box together because it gives a bit of movement when sticking bits together instead of that instant bond with d/s tape. It also has a mega strong bond when dry.
Once you've done this add glue to the outside of the little tabs. ..and stick to the inside of the box sides. Then add more tombow to the inside of each side and tuck these flaps in place. I used a bone folder with the glue edge flat on a surface to smooth over and ensure a nice firm bond has taken place and there's no inside edges lifting up.Your card holder will then look like this... Finally add more tombow to the inside of the two long tabs........and stick to the outside of the cardholder. And there you have it! This is the decorated cardholder with 3 matching cards. Well I hope you can make use of this and I'd love to see what you've created. You can leave a link with Mr Linky below if you like and I'll pop by and have a look.