Here is what you need:
Leather or faux leather.. (the size is up to you depending on how big or small you want your clutch to be, I made one reg. size clutch and one smaller one almost like a change purse and I bought the leather from a scrap bin at our local fabric discount store)
1 button for each clutch if you make more than one
Acrylic paint
Small paintbrushes in various shapes depending on your design
Pencil
Scissors
Sewing machine
Needle and thread

Here is how you make it:

Start by cutting out your leather piece into a long rectangle with one end that has curved edges (this will be the flap to close the clutch…see 2nd photo below). Then, practice folding the bottom of the clutch up and then the top flap over to see how it will look when finished just to get an idea of how much to fold up the pouch part. Next, fold the pouch the same way but inside out so the shiny outside leather is facing in. Sew up both sides getting as close to the edge as you can. Snip off any extra leather from the side and turn right side out. With the scissors closed, use the end to push the inside of the corners out as much as you can. Then take your pencil and draw your design and paint it. Once dry, locate the lower center of the top flap where the button will go and mark it. Take your scissors and cut a ‘t’ big enough to fit the button through. Close the flap like you would when you are closing your clutch and stick your pencil through your ‘t’ mark that you cut and mark the piece underneath where you will sew the button. With the needle and thread, attach the button on the mark you just made.  And that is it! For the first clutch I painted a geometric pattern on the entire front and for the second rather than paint a design, I chose to cut an interesting shape for the flap and keep it simple by painting it pink to have a color block effect. But make it however you like and if you do, please post pictures in the comments, I would love to see them!