This is a short posting just to share with you the measurements that I used for this card I created and posted previously HERE.
I wasn't sure what to call this card, but I googled 'fancy fold cards' and found a few similar cards (with different configurations) and they call them tri-fold cards, so let's go with that name then.
Here's the tempate that I used. I've worked out the measurements so that they will give me a 6" x 6" (15cm x 15cm) card when folded, which is my preferred card size for a square card.
(Edited - Nov. 13, 2016: Thanks to Josette for pointing out the miscalulation in the cm measurements in my previous template. Much appreciated. The template has now been corrected.)
For printable PDF, click on this link: Tri-Fold Card Template 6" x 6" (15cm x 15cm) when folded
That's it! Happy crafting.