This is a 5 x 5 arrow point sketch card that can be found here: SC823 This is the splitcoaststampers site with fabulous ideas. Their instructions are for a 6 x 6 card.
Here are my instructions for a 5 x 5 card. Start with a car stock that is 10" x 5", score at 5".
Open up your card and put a center pencil mark at 2 1/2 inches, this the center of the front of your card then measure down 2 1/2 inches on each side of the card and put a pencil mark. Now score with your scoring tool from the 1st corner to the center mark on each side, then score from the 2 1/2 inch mark to the center mark.
Now fold the long score to the inside and the short score to the the outside.
This is what mat 1 and 2 will look like. draw a line from mat 1 from the center pencil mark at 2 1/2 inches to the outer edge.
Mat one is 4 3/4 x 4 3/4, put a pencil mark in the center at 2 3/8 inches and draw a line on each side from the center mark to the outer corner edge of the card. Do this on each side.
Do the same for mat 2. put a pencil mark at the center which is 2 1/4 inches, cut both. I always draw my pencil lines on the back of the paper, make sure you have your paper fancing in the correct direction before marking or cutting from the backside.